Fix test NPEs due to insufficient singleton mocking

Bug: 365800992
Test: com.android.phone.satellite.accesscontrol.SatelliteAccessControllerTest
Test: com.android.services.telephony.TelephonyConnectionServiceTest
Flag: TEST_ONLY
Change-Id: Ibc6d216056e56a6909621d90a6c580f84a0046d3
2 files changed