Cherry-pick fixes from master

src/Mono.Android/java/mono/android/Runtime.java

@@ -6,7 +6,7 @@ private Runtime ()
 	{
 	}
 
-	public static native void init (String lang, String[] runtimeApks, String runtimeDataDir, String[] appDirs, ClassLoader loader, String externalStorageDir, String[] assemblies, String packageName);
+	public static native void init (String lang, String[] runtimeApks, String runtimeDataDir, String[] appDirs, ClassLoader loader, String[] externalStorageDirs, String[] assemblies, String packageName);
 	public static native void register (String managedType, java.lang.Class nativeClass, String methods);
 	public static native void notifyTimeZoneChanged ();
 	public static native int createNewContext (String[] runtimeApks, String[] assemblies, ClassLoader loader);

src/Xamarin.Android.Build.Tasks/Resources/MonoPackageManager.api4.java

@@ -38,6 +38,13 @@ public static void LoadApplication (Context context, ApplicationInfo runtimePack
 				String cacheDir     = context.getCacheDir ().getAbsolutePath ();
 				String dataDir      = context.getApplicationInfo ().dataDir + "/lib";
 				ClassLoader loader  = context.getClassLoader ();
+				java.io.File external0 = android.os.Environment.getExternalStorageDirectory ();
+				String externalDir = new java.io.File (
+							external0,
+							"Android/data/" + context.getPackageName () + "/files/.__override__").getAbsolutePath ();
+				String externalLegacyDir = new java.io.File (
+							external0,
+							"../legacy/Android/data/" + context.getPackageName () + "/files/.__override__").getAbsolutePath ();
 
 				Runtime.init (
 						language,
@@ -49,9 +56,10 @@ public static void LoadApplication (Context context, ApplicationInfo runtimePack
 							dataDir,
 						},
 						loader,
-						new java.io.File (
-							android.os.Environment.getExternalStorageDirectory (),
-							"Android/data/" + context.getPackageName () + "/files/.__override__").getAbsolutePath (),
+						new String[] {
+							externalDir,
+							externalLegacyDir
+						},
 						MonoPackageManager_Resources.Assemblies,
 						context.getPackageName ());
 

src/Xamarin.Android.Build.Tasks/Resources/MonoPackageManager.java

@@ -38,6 +38,13 @@ public static void LoadApplication (Context context, ApplicationInfo runtimePack
 				String cacheDir     = context.getCacheDir ().getAbsolutePath ();
 				String dataDir      = getNativeLibraryPath (context);
 				ClassLoader loader  = context.getClassLoader ();
+				java.io.File external0 = android.os.Environment.getExternalStorageDirectory ();
+				String externalDir = new java.io.File (
+							external0,
+							"Android/data/" + context.getPackageName () + "/files/.__override__").getAbsolutePath ();
+				String externalLegacyDir = new java.io.File (
+							external0,
+							"../legacy/Android/data/" + context.getPackageName () + "/files/.__override__").getAbsolutePath ();
 
 				Runtime.init (
 						language,
@@ -49,9 +56,10 @@ public static void LoadApplication (Context context, ApplicationInfo runtimePack
 							dataDir,
 						},
 						loader,
-						new java.io.File (
-							android.os.Environment.getExternalStorageDirectory (),
-							"Android/data/" + context.getPackageName () + "/files/.__override__").getAbsolutePath (),
+						new String[] {
+							externalDir,
+							externalLegacyDir
+						},
 						MonoPackageManager_Resources.Assemblies,
 						context.getPackageName ());
 

src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/ManifestTest.cs

@@ -486,6 +486,8 @@ public void MergeLibraryManifest ()
             android:authorities='${applicationId}.FacebookInitProvider'
             android:name='.internal.FacebookInitProvider'
             android:exported='false' />
+        <meta-data android:name='android.support.VERSION' android:value='25.4.0' />
+        <meta-data android:name='android.support.VERSION' android:value='25.4.0' />
     </application>
 </manifest>
 ", encoding: System.Text.Encoding.UTF8);
@@ -522,6 +524,8 @@ public void MergeLibraryManifest ()
 						"${applicationId}.FacebookInitProvider was not replaced with com.xamarin.manifest.FacebookInitProvider");
 					Assert.IsTrue (manifest.Contains ("com.xamarin.test.internal.FacebookInitProvider"),
 						".internal.FacebookInitProvider was not replaced with com.xamarin.test.internal.FacebookInitProvider");
+					Assert.AreEqual (manifest.IndexOf ("meta-data", StringComparison.OrdinalIgnoreCase),
+					                 manifest.LastIndexOf ("meta-data", StringComparison.OrdinalIgnoreCase), "There should be only one meta-data element");
 				}
 			}
 		}

src/Xamarin.Android.Build.Tasks/Utilities/ManifestDocument.cs

@@ -401,6 +401,16 @@ void MergeLibraryManifest (string mergedManifest)
 			}
 		}
 
+		void RemoveDuplicateElements ()
+		{
+			var duplicates = doc.Descendants ()
+			                    .GroupBy (x => x.ToFullString ())
+					    .SelectMany (x => x.Skip (1));
+			foreach (var duplicate in duplicates)
+				duplicate.Remove ();
+
+		}
+
 		IEnumerable<XNode> FixupNameElements(string packageName, IEnumerable<XNode> nodes)
 		{
 			foreach (var element in nodes.Select ( x => x as XElement).Where (x => x != null && ManifestAttributeFixups.ContainsKey (x.Name.LocalName))) {
@@ -838,6 +848,7 @@ public void Save (string filename)
 
 		public void Save (System.IO.TextWriter stream)
 		{
+			RemoveDuplicateElements ();
 			var ms = new MemoryStream ();
 			doc.Save (ms);
 			ms.Flush ();

src/Xamarin.Android.Build.Tasks/Utilities/XDocumentExtensions.cs

@@ -22,6 +22,11 @@ public static string[] GetPaths (this XDocument doc, params string[] paths)
 				e = e.Elements (p);
 			return e.Select (p => p.Value).ToArray ();
 		}
+
+		public static string ToFullString (this XElement element)
+		{
+			return element.ToString (SaveOptions.DisableFormatting);
+		}
 	}
 }
 

src/Xamarin.Android.Build.Tasks/Xamarin.Android.Common.targets

@@ -279,6 +279,11 @@ Copyright (C) 2011-2012 Xamarin. All rights reserved.
 			<AndroidIncludeDebugSymbols>True</AndroidIncludeDebugSymbols>
 		</PropertyGroup>
 	</When>
+	<When Condition=" '$(EmbedAssembliesIntoApk)' == 'False' ">
+		<PropertyGroup>
+			<AndroidIncludeDebugSymbols>True</AndroidIncludeDebugSymbols>
+		</PropertyGroup>
+	</When>
 	<Otherwise>
 		<PropertyGroup>
 			<AndroidIncludeDebugSymbols>False</AndroidIncludeDebugSymbols>
@@ -1025,7 +1030,7 @@ because xbuild doesn't support framework reference assemblies.
 	</ReadLinesFromFile>
 </Target>
 
-<Target Name="_CreatePropertiesCache" DependsOnTargets="_ReadPropertiesCache">
+<Target Name="_CreatePropertiesCache" DependsOnTargets="_SetupDesignTimeBuildForBuild;_ReadPropertiesCache">
 	<MakeDir Directories="$(IntermediateOutputPath)" Condition="!Exists('$(IntermediateOutputPath)')" />
 	<WriteLinesToFile
 		Condition="'@(_PropertiesCache)' != '@(_PropertyCacheItems)'" 

src/monodroid/jni/monodroid-glue.c

@@ -329,7 +329,7 @@ monodroid_get_system_property (const char *name, char **value)
 #ifdef RELEASE
 #define MAX_OVERRIDES 1
 #else
-#define MAX_OVERRIDES 2
+#define MAX_OVERRIDES 3
 #endif
 static char* override_dirs [MAX_OVERRIDES];
 
@@ -410,6 +410,7 @@ get_primary_override_dir (JNIEnv *env, jstring home)
 
 static char *primary_override_dir;
 static char *external_override_dir;
+static char *external_legacy_override_dir;
 
 static void
 create_update_dir (char *override_dir)
@@ -651,6 +652,7 @@ get_libmonosgen_path ()
 	// external storage locations so we need to file copy the shared object to an internal
 	// storage location before loading it.
 	copy_monosgen_to_internal_location (primary_override_dir, external_override_dir);
+	copy_monosgen_to_internal_location (primary_override_dir, external_legacy_override_dir);
 
 	int i;
 	for (i = 0; i < MAX_OVERRIDES; ++i)
@@ -2512,6 +2514,7 @@ get_ds2_path ()
 	for (i = 0; i < sizeof (gdbservers)/sizeof (gdbservers [0]); ++i) {
 		file = monodroid_strdup_printf ("%s", gdbservers [i]);
 		copy_file_to_internal_location (primary_override_dir, external_override_dir, file);
+		copy_file_to_internal_location (primary_override_dir, external_legacy_override_dir, file);
 		free (file);
 	}
 
@@ -3893,7 +3896,7 @@ create_and_initialize_domain (JNIEnv* env, jobjectArray runtimeApks, jobjectArra
 }
 
 JNIEXPORT void JNICALL
-Java_mono_android_Runtime_init (JNIEnv *env, jclass klass, jstring lang, jobjectArray runtimeApks, jstring runtimeNativeLibDir, jobjectArray appDirs, jobject loader, jstring externalStorageDir, jobjectArray assemblies, jstring packageName)
+Java_mono_android_Runtime_init (JNIEnv *env, jclass klass, jstring lang, jobjectArray runtimeApks, jstring runtimeNativeLibDir, jobjectArray appDirs, jobject loader, jobjectArray externalStorageDirs, jobjectArray assemblies, jstring packageName)
 {
 	char *runtime_args = NULL;
 	char *connect_args;
@@ -3923,9 +3926,13 @@ Java_mono_android_Runtime_init (JNIEnv *env, jclass klass, jstring lang, jobject
 	setup_environment (env, runtimeApks);
 
 	primary_override_dir = get_primary_override_dir (env, (*env)->GetObjectArrayElement (env, appDirs, 0));
-	esd = (*env)->GetStringUTFChars (env, externalStorageDir, NULL);
+	esd = (*env)->GetStringUTFChars (env, (*env)->GetObjectArrayElement (env, externalStorageDirs, 0), NULL);
 	external_override_dir = monodroid_strdup_printf ("%s", esd);
-	(*env)->ReleaseStringUTFChars (env, externalStorageDir, esd);
+	(*env)->ReleaseStringUTFChars (env, (*env)->GetObjectArrayElement (env, externalStorageDirs, 0), esd);
+
+	esd = (*env)->GetStringUTFChars (env, (*env)->GetObjectArrayElement (env, externalStorageDirs, 1), NULL);
+	external_legacy_override_dir = monodroid_strdup_printf ("%s", esd);
+	(*env)->ReleaseStringUTFChars (env, (*env)->GetObjectArrayElement (env, externalStorageDirs, 1), esd);
 
 	init_categories (primary_override_dir);
 	create_update_dir (primary_override_dir);
@@ -3937,6 +3944,7 @@ Java_mono_android_Runtime_init (JNIEnv *env, jclass klass, jstring lang, jobject
 
 #ifndef RELEASE
 	override_dirs [1] = external_override_dir;
+	override_dirs [2] = external_legacy_override_dir;
 	for (i = 0; i < MAX_OVERRIDES; ++i) {
 		const char *p = override_dirs [i];
 		if (!directory_exists (p))