package io.keybase.ossifrage;

import android.app.Application;
import com.facebook.react.ReactApplication;
import com.facebook.react.ReactNativeHost;
import com.facebook.react.ReactPackage;
import com.facebook.react.shell.MainReactPackage;
import com.dieam.reactnativepushnotification.ReactNativePushNotificationPackage;

import java.io.File;
import java.util.Arrays;
import java.util.List;

public class MainApplication extends Application implements ReactApplication {
  private File logFile;

  @Override
  public void onCreate () {
    super.onCreate();

    logFile = this.getFileStreamPath("android.log");
  }

  private final ReactNativeHost mReactNativeHost = new ReactNativeHost(this) {

    @Override
    protected boolean getUseDeveloperSupport() {
      return BuildConfig.DEBUG;
    }

    @Override
    protected List<ReactPackage> getPackages() {
      return Arrays.<ReactPackage>asList(
              new MainReactPackage(),
              new KBReactPackage(logFile.getAbsolutePath()),
              new ReactNativePushNotificationPackage()
      );
    }

  };

  @Override
  public ReactNativeHost getReactNativeHost() {
      return mReactNativeHost;
  }
}

package io.keybase.ossifrage;

import android.app.Application;
import com.facebook.react.ReactApplication;
import com.facebook.react.ReactNativeHost;
import com.facebook.react.ReactPackage;
import com.facebook.react.shell.MainReactPackage;
import com.dieam.reactnativepushnotification.ReactNativePushNotificationPackage;

import java.io.File;
import java.util.Arrays;
import java.util.List;

public class MainApplication extends Application implements ReactApplication {
  private File logFile;

  @Override
  public void onCreate () {
    super.onCreate();

    logFile = this.getFileStreamPath("android.log");
  }

  private final ReactNativeHost mReactNativeHost = new ReactNativeHost(this) {

    @Override
    public boolean getUseDeveloperSupport() {
      return BuildConfig.DEBUG;
    }

    @Override
    protected List<ReactPackage> getPackages() {
      return Arrays.<ReactPackage>asList(
              new MainReactPackage(),
              new KBReactPackage(logFile.getAbsolutePath()),
              new ReactNativePushNotificationPackage()
      );
    }

  };

  @Override
  public ReactNativeHost getReactNativeHost() {
      return mReactNativeHost;
  }
}

Switch getUseDeveloperSupport to public