MainApplication.java

. . . 
  // lots of imports

public class MainApplication extends Application implements ReactApplication {

  . . . 

    @Override
    protected List<ReactPackage> getPackages() {
      return Arrays.<ReactPackage>asList(
          new MainReactPackage(),
        . . .
          // your linked dependencies,
            new ImmersiveModePackage()
      );
    }

   . . . 
     // all the rest
}