Remove SoLoaderShim, use SoLoader

Summary:
SoLoader is more stable on older versions of Android. Switching to it should fix recurring issues that we get such as `UnsatisfiedLinkError` and so on.

CI + run showcase app.
Closes facebook/fresco#1989

Reviewed By: erikandre

Differential Revision: D6556420

Pulled By: foghina

fbshipit-source-id: ffc3faef6452294b4d781258c64ef57e08d107b5

ReactAndroid/src/main/java/com/facebook/react/modules/fresco/FrescoModule.java

@@ -15,7 +15,6 @@
 import android.support.annotation.Nullable;
 
 import com.facebook.common.logging.FLog;
-import com.facebook.common.soloader.SoLoaderShim;
 import com.facebook.drawee.backends.pipeline.Fresco;
 import com.facebook.imagepipeline.backends.okhttp3.OkHttpImagePipelineConfigFactory;
 import com.facebook.imagepipeline.core.ImagePipelineConfig;
@@ -100,9 +99,6 @@ public void initialize() {
     super.initialize();
     getReactApplicationContext().addLifecycleEventListener(this);
     if (!hasBeenInitialized()) {
-      // Make sure the SoLoaderShim is configured to use our loader for native libraries.
-      // This code can be removed if using Fresco from Maven rather than from source
-      SoLoaderShim.setHandler(new FrescoHandler());
       if (mConfig == null) {
         mConfig = getDefaultConfig(getReactApplicationContext());
       }
@@ -186,11 +182,4 @@ public void onHostDestroy() {
       Fresco.getImagePipeline().clearMemoryCaches();
     }
   }
-
-  private static class FrescoHandler implements SoLoaderShim.Handler {
-    @Override
-    public void loadLibrary(String libraryName) {
-      SoLoader.loadLibrary(libraryName);
-    }
-  }
 }