moveToResumedLifecycleState must be called from UI thread

Summary:
I was seeing a SoftException in our apps due to this method being called as part of ReactInstanceManager's init. It seems inconsistent that we would call this from a background thread when all other `onHost*` methods are marked as confined to the UI thread.

Changelog: [Internal]

Reviewed By: ryancat

Differential Revision: D34340210

fbshipit-source-id: 0104eda66b2ca6bb315e64e806e9a30409d0d45c

ReactAndroid/src/main/java/com/facebook/react/ReactInstanceManager.java

@@ -1175,7 +1175,6 @@ private void setupReactContext(final ReactApplicationContext reactContext) {
 
       mDevSupportManager.onNewReactContextCreated(reactContext);
       mMemoryPressureRouter.addMemoryPressureListener(catalystInstance);
-      moveReactContextToCurrentLifecycleState();
 
       ReactMarker.logMarker(ATTACH_MEASURED_ROOT_VIEWS_START);
       for (ReactRoot reactRoot : mAttachedReactRoots) {
@@ -1197,6 +1196,8 @@ private void setupReactContext(final ReactApplicationContext reactContext) {
         new Runnable() {
           @Override
           public void run() {
+            moveReactContextToCurrentLifecycleState();
+
             for (com.facebook.react.ReactInstanceEventListener listener : finalListeners) {
               // Sometimes this listener is null - probably due to race
               // condition between allocating listeners with a certain
@@ -1208,10 +1209,6 @@ public void run() {
             }
           }
         });
-    Systrace.endSection(TRACE_TAG_REACT_JAVA_BRIDGE);
-    ReactMarker.logMarker(SETUP_REACT_CONTEXT_END);
-    // Mark end of bridge loading
-    ReactMarker.logMarker(ReactMarkerConstants.REACT_BRIDGE_LOADING_END);
     reactContext.runOnJSQueueThread(
         new Runnable() {
           @Override
@@ -1227,6 +1224,11 @@ public void run() {
             Process.setThreadPriority(Process.THREAD_PRIORITY_DEFAULT);
           }
         });
+
+    Systrace.endSection(TRACE_TAG_REACT_JAVA_BRIDGE);
+    ReactMarker.logMarker(SETUP_REACT_CONTEXT_END);
+    // Mark end of bridge loading
+    ReactMarker.logMarker(ReactMarkerConstants.REACT_BRIDGE_LOADING_END);
   }
 
   private void attachRootViewToInstance(final ReactRoot reactRoot) {

ReactAndroid/src/main/java/com/facebook/react/bridge/ReactContext.java

@@ -254,6 +254,7 @@ public void removeWindowFocusChangeListener(WindowFocusChangeListener listener)
   }
 
   /** Should be called by the hosting Fragment in {@link Fragment#onResume} */
+  @ThreadConfined(UI)
   public void onHostResume(@Nullable Activity activity) {
     mLifecycleState = LifecycleState.RESUMED;
     mCurrentActivity = new WeakReference(activity);
@@ -282,6 +283,7 @@ public void onNewIntent(@Nullable Activity activity, Intent intent) {
   }
 
   /** Should be called by the hosting Fragment in {@link Fragment#onPause} */
+  @ThreadConfined(UI)
   public void onHostPause() {
     mLifecycleState = LifecycleState.BEFORE_RESUME;
     ReactMarker.logMarker(ReactMarkerConstants.ON_HOST_PAUSE_START);