Fix MissingOverrideAnnotation in ReactRootView.java (#55404)

Summary:
Pull Request resolved: #55404

Added Override annotation to getState() method which overrides a method from a superclass.

changelog: [internal] internal

Reviewed By: javache

Differential Revision: D91815279

fbshipit-source-id: b2e9613c864b02c6392aa75a2318e2811455d895

Author: mdvacca

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/ReactRootView.java

@@ -617,6 +617,7 @@ public String getSurfaceID() {
     return appProperties != null ? appProperties.getString("surfaceID") : null;
   }
 
+  @Override
   public AtomicInteger getState() {
     return mState;
   }