[Android] Re-register boundaries on device boot

[Michael Ruhl]

According to the Android documentation the boundaries need to be re-registered after an device boot:

The app must re-register geofences if they're still needed after the following events, since the system cannot recover the geofences in the following cases:

• The device is rebooted. The app should listen for the device's boot complete action, and then re- register the geofences required.

https://developer.android.com/training/location/geofencing#re-register-geofences-only-when-required