Expose Android RemoteMessage.getPriority() and RemoteMessage.getOriginalPriority()

[gdogaru]

The Android priority and originalPriority are important, since high priority messages allow the app to do extra operations, like start a foreground service. If Android decides to demote your message from high to normal, you are not allowed to start the service, and the app will fail with an exception.

I saw there is a message.notification?.android?.priority but I could not get that to populate for data only messages.

Info about Android message priority. the https://firebase.google.com/docs/cloud-messaging/android/message-priority