Implement completion callback for LayoutAnimation on Android

Summary: All animations are scheduled by the UIManager while it processes a batch of changes, so we can just wait to see what the longest animation is and cancel+reschedule the callback.

Reviewed By: mdvacca

Differential Revision: D14656733

fbshipit-source-id: 4cbbb7e741219cd43f511f2ce750c53c30e2b2ca

ReactAndroid/src/main/java/com/facebook/react/uimanager/UIViewOperationQueue.java

@@ -369,14 +369,16 @@ public class UIViewOperationQueue {
 
   private class ConfigureLayoutAnimationOperation implements UIOperation {
     private final ReadableMap mConfig;
+    private final Callback mAnimationComplete;
 
-    private ConfigureLayoutAnimationOperation(final ReadableMap config) {
+    private ConfigureLayoutAnimationOperation(final ReadableMap config, final Callback animationComplete) {
       mConfig = config;
+      mAnimationComplete = animationComplete;
     }
 
     @Override
     public void execute() {
-      mNativeViewHierarchyManager.configureLayoutAnimation(mConfig);
+      mNativeViewHierarchyManager.configureLayoutAnimation(mConfig, mAnimationComplete);
     }
   }
 
@@ -741,9 +743,8 @@ public class UIViewOperationQueue {
 
   public void enqueueConfigureLayoutAnimation(
       final ReadableMap config,
-      final Callback onSuccess,
-      final Callback onError) {
-    mOperations.add(new ConfigureLayoutAnimationOperation(config));
+      final Callback onAnimationComplete) {
+    mOperations.add(new ConfigureLayoutAnimationOperation(config, onAnimationComplete));
   }
 
   public void enqueueMeasure(