Added Satellite Messaging APIs.

The following apis are added in this CL:
- registerForSatelliteStateChange()
- unregisterForSatelliteStateChange()
- registerForSatelliteDatagram()
- unregisterForSatelliteDatagram()
- getPendingSatelliteDatagrams()

Bug: 260896985
Test: atest SatelliteManagerTest
Change-Id: I1d8976cedc1b07f5f993fe2d5046d00501f1688a
1 file changed