 two different sources: Google Cloud Messaging (GCM) or
 the Parse Push Notification Service (PPNS). Parse will inspect your application's manifest at
 runtime and determine which service to use for push. We recommend using GCM for push on devices
 that have Google Play Store support. PPNS support is provided for apps that want to avoid a
 dependency on the Google Play Store, and for devices (like Kindles) which do not have Play Store
 support.
 
 To configure the PushService for GCM, ensure these permissio