Introduce TransparentImmersiveReactActivity in FB4A

Summary:
This diff creates the new TransparentImmersiveReactActivity in FB4A, the intention is to help integrate TransparentReactActivity with Fb4A

Changelog: [Deprecated][Android] Deprecated method UIManagerModule.getUIImplementation. This method will not be part of the new architecture of React Native.

Reviewed By: stashuk

Differential Revision: D23324543

fbshipit-source-id: 35395fe410790a9611a4637361b888678eb0a836

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

@@ -198,7 +198,10 @@ public UIManagerModule(
   /**
    * This method gives an access to the {@link UIImplementation} object that can be used to execute
    * operations on the view hierarchy.
+   *
+   * @deprecated This method will not be supported by the new architecture of react native.
    */
+  @Deprecated
   public UIImplementation getUIImplementation() {
     return mUIImplementation;
   }