Fix for react-native#9319

MainApplication.java

// Add the following imports and methods in their respective places

import com.facebook.infer.annotation.Assertions;
import com.facebook.react.LifecycleState;


public class MainApplication extends Application implements ReactApplication {
  protected Application getApplication() { return this; }
  private final ReactNativeHost mReactNativeHost = new ReactNativeHost(this) {
    @Override
    protected ReactInstanceManager createReactInstanceManager() {
      ReactInstanceManager.Builder builder = ReactInstanceManager.builder()
        .setUseOldBridge(true)
        .setApplication(getApplication())
        .setJSMainModuleName(getJSMainModuleName())
        .setUseDeveloperSupport(getUseDeveloperSupport())
        .setInitialLifecycleState(LifecycleState.BEFORE_CREATE);

      for (ReactPackage reactPackage : getPackages()) {
        builder.addPackage(reactPackage);
      }

      String jsBundleFile = getJSBundleFile();
      if (jsBundleFile != null) {
        builder.setJSBundleFile(jsBundleFile);
      } else {
        builder.setBundleAssetName(Assertions.assertNotNull(getBundleAssetName()));
      }

      return builder.build();
    }
  }
}