Set radio power state to OFF only after getting the state changed event from modem

Problem scenario:
1. APM is enabled
2. SatelliteController get the notification onCellularRadioPowerOffRequested
3. SatelliteController set its radio power state to OFF
4. Modem fails to power off the modem
5. APM is disabled. Since radio state is still on, no update for radio power state from modem is sent.
6. SatelliteController still think radio power is OFF
7. SatelliteController rejects the requests to enable satellite

Flag: EXEMPT bugfix
Bug: 355242339
Test: manual test with Skylo live network
atest SatelliteControllerTest
atest ServiceStateTrackerTest
Test: 356653075

Change-Id: I2595afef393c735a2bb474e6fb0bf930b1238d17