Android 9.0 PebbleService support

[MarcOnFire]

First of all, thank you so much for all the effort you put on this project. It's awesome <3

I'm facing a little problem with the incoming requests from Pebble, it seems that the latest version of Android changed something about the BroadcastReceiver class (I can't play horn).

I've got this log from my Samsung S8, Android 9: W BroadcastQueue: Background execution not allowed: receiving Intent { act=com.getpebble.action.app.RECEIVE flg=0x10 (has extras) } to com.cooper.wheellog/.PebbleBroadcastReceiver

I'm trying to solve the problem but without any success till now.

Maybe this guy encountered the same problem: https://github.com/Mauin/ReactiveAwareness/issues/11

Again, a big thanks to all developers.