Send sms to DatagramDispatcher only after checking all conditions

Send P2P SMS to DatagramDispatcher if all of the following conditions are met:
- Device is in carrier roaming nb iot ntn mode
- Device is not in demo mode
- Carrier supports P2P SMS.

Start P2P SMS inactivity timer, Screen off timer if all of the following
conditions are met:
- Device supports P2P SMS
- Carrier has P2P SMS service when it is connected to carrier roaming
  ntn.

Bug: 377028534
Test: atest SmsDispatchersControllerTest, atest
SatelliteSessionControllerTest, atest SatelliteControllerTest
Test: Manlly tested SMS/MMS/CALLS/DATA
FLAG: com.android.internal.telephony.flags.carrier_roaming_nb_iot_ntn

Change-Id: Icadb1422ecacc204f6694e60870d03ab80618a87