@Override
    protected boolean isConcurrentRootEnabled() {
      // If you opted-in for the New Architecture, we enable Concurrent Root (i.e. React 18).
      // More on this on https://reactjs.org/blog/2022/03/29/react-v18.html
      return BuildConfig.IS_NEW_ARCHITECTURE_ENABLED;
    }
Returns the instance of the {@link ReactActivityDelegate}. There the RootView is created and
you can specify the renderer you wish to use - the new renderer (Fabric) or the old renderer
(Paper).
template/android/app/src/main/java/com/helloworld/MainActivity.java