Add onCarrierRoamingNtnEligibleStateChanged callback

The following changes are made:
- Added new onCarrierRoamingNtnEligibleStateChanged callback in
  CarrierRoamingNtnModeListener to notify external listeners when device
  is eligible to connect to NTN network.
- Added following new carrier configs:
  1. KEY_CARRIER_ROAMING_NTN_CONNECT_TYPE_INT
  2. KEY_CARRIER_SUPPORTED_SATELLITE_NOTIFICATION_HYSTERESIS_SEC_INT
- Added CARRIER_ROAMING_NTN_CONNECT_TYPE enum

Bug: 350396906
Test: atest TelephonyCallbackTest, atest TelephonyRegistryManagerTest
Manula Test: b/353971031
Flag: com.android.internal.telephony.flags.carrier_roaming_nb_iot_ntn

Change-Id: Ic5d1d72cad83614175e91c20cfc340ac1898a5fb