Mark mOnViewAttachMountItems as final in SurfaceMountingManager.java (facebook#54344)

Summary:
Pull Request resolved: facebook#54344

Changelog: [Internal]

Reviewed By: mdvacca

Differential Revision: D85904478

fbshipit-source-id: 961d12bf1cbf04b9087a518531b20d87be3ccb63

Author: javache

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/fabric/mounting/SurfaceMountingManager.java

@@ -80,7 +80,7 @@ public class SurfaceMountingManager {
   // These are all non-null, until StopSurface is called
   private ConcurrentHashMap<Integer, ViewState> mTagToViewState =
       new ConcurrentHashMap<>(); // any thread
-  private Queue<MountItem> mOnViewAttachMountItems = new ArrayDeque<>();
+  private final Queue<MountItem> mOnViewAttachMountItems = new ArrayDeque<>();
   private JSResponderHandler mJSResponderHandler;
   private ViewManagerRegistry mViewManagerRegistry;
   private RootViewManager mRootViewManager;