Add mutlidex support to react native android application

mutlidex-application.java

// Add `implementation 'com.android.support:multidex:1.0.3'` to dependencies in android/app/build.gradle 
// Update MainApplication.java with following code with following 

import android.support.multidex.MultiDexApplication;

public class MainApplication extends MultiDexApplication implements ReactApplication {
  private final ReactNativeHost mReactNativeHost = new ReactNativeHost(this) {

    @Override
    protected List<ReactPackage> getPackages() {
      return Arrays.<ReactPackage>asList(
          new MainReactPackage()
      );
    }
}