Support animation events in ViewEventModule

Summary:
Adds support for handling animations in response to events on the platform side, without needing a JS round trip. With this TM, NativeViewEvents will no longer affected by JS thread - hover events will not be delayed when JS thread is busy. This makes a significant difference for VR panel apps - see test plan for an example for the before and after in Store.

Changelog:
[Internal] - Make NativeAnimatedNodesManager public

Reviewed By: JoshuaGross

Differential Revision: D37082069

fbshipit-source-id: 330acd78c547587de5545b61895e0d821fb99552

ReactAndroid/src/main/java/com/facebook/react/animated/NativeAnimatedModule.java

@@ -411,7 +411,7 @@ public class NativeAnimatedModule extends NativeAnimatedModuleSpec
    * @return {@link NativeAnimatedNodesManager}
    */
   @Nullable
-  private NativeAnimatedNodesManager getNodesManager() {
+  public NativeAnimatedNodesManager getNodesManager() {
     if (mNodesManager.get() == null) {
       ReactApplicationContext reactApplicationContext = getReactApplicationContextIfActiveOrWarn();
 

ReactAndroid/src/main/java/com/facebook/react/animated/NativeAnimatedNodesManager.java

@@ -51,7 +51,7 @@ import java.util.Queue;
  *
  * <p>IMPORTANT: This class should be accessed only from the UI Thread
  */
-/*package*/ class NativeAnimatedNodesManager implements EventDispatcherListener {
+public class NativeAnimatedNodesManager implements EventDispatcherListener {
 
   private static final String TAG = "NativeAnimatedNodesManager";