Fix leak in Nodes due to removeClippedSubviews

Reviewed By: astreet

Differential Revision: D3337513

fbshipit-source-id: b7b798f024488cd19cdcf93aee7f99eed512dd6a

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

@@ -466,7 +466,7 @@ public class NativeViewHierarchyManager {
   /**
    * Releases all references to given native View.
    */
-  protected final void dropView(View view) {
+  protected void dropView(View view) {
     UiThreadUtil.assertOnUiThread();
     if (!mRootTags.get(view.getId())) {
       // For non-root views we notify viewmanager with {@link ViewManager#onDropInstance}