Expose SatelliteManager as public manager class

This change exposes SatelliteManager as an @SystemService, with instance
retrieved with Context.getSystemService and Context.SATELLITE_SERVICE.

New public APIs will be provided for applications with permision to
monitor and query the enabled state for satellite modem.

Bug: 357638490
Test: FrameworksTelephonyTests SatelliteManagerTest SatelliteManagerTestOnMockService
Flag: com.android.internal.telephony.flags.satellite_state_change_listener
Change-Id: I3194c245f41fa24d16d0ea0a71166dc918e50a2a