Expose receiveEvent as a high level API on UIManager

Summary:
This diff exposes receiveEvent on the UIManager class. This is necessary to support backward compatibility between Fabric and classic RN

changelog: [Internal]

Reviewed By: JoshuaGross

Differential Revision: D21979687

fbshipit-source-id: 1ec75896687d55e699f79c520e21f05fac368ee6

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

@@ -113,4 +113,14 @@ public interface UIManager extends JSIModule, PerformanceCounter {
    * @param listener
    */
   void removeUIManagerEventListener(UIManagerListener listener);
+
+  /**
+   * This method dispatches events from RN Android code to JS. The delivery of this event will not
+   * be queued in EventDispatcher class.
+   *
+   * @param reactTag tag
+   * @param eventName name of the event
+   * @param event parameters
+   */
+  void receiveEvent(int reactTag, String eventName, @Nullable WritableMap event);
 }

ReactAndroid/src/main/java/com/facebook/react/fabric/FabricUIManager.java

@@ -946,6 +946,7 @@ public class FabricUIManager implements UIManager, LifecycleEventListener {
         doLeftAndRightSwapInRTL);
   }
 
+  @Override
   public void receiveEvent(int reactTag, String eventName, @Nullable WritableMap params) {
     EventEmitterWrapper eventEmitter = mMountingManager.getEventEmitter(reactTag);
     if (eventEmitter == null) {

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

@@ -950,4 +950,11 @@ public class UIManagerModule extends ReactContextBaseJavaModule
         .getNativeViewHierarchyManager()
         .resolveView(tag);
   }
+
+  @Override
+  public void receiveEvent(int targetTag, String eventName, @Nullable WritableMap event) {
+    getReactApplicationContext()
+        .getJSModule(RCTEventEmitter.class)
+        .receiveEvent(targetTag, eventName, event);
+  }
 }