Add CarrierRoamingSatelliteSmsTest using mock modem.

The following changing are made in this CL:
- Updated mock modem to support send and recive sms functionalities
- Added new MockMessagingService file
- Added two tests: testSendMessage and testReceiveMessage

Bug: 326103327
Test: adb shell device_config put telephony com.android.internal.telephony.flags.carrier_enabled_satellite_flag true
atest "CtsTelephonyTestCases:android.telephony.satellite.cts.CarrierRoamingSatelliteSmsTest" --rerun-until-failure 100 > Test.log

Change-Id: Ifed12a8fe04ed0715bb6817735fa74e6691b1908