Improve SatelliteAccessControllerTest (unit test) isolation

Also, improve incomplete environment handling in SatelliteAccessController

Bug: 365800992
Test: com.android.phone.satellite.accesscontrol.SatelliteAccessControllerTest
Test: com.android.phone.satellite.entitlement.SatelliteEntitlementControllerTest
Flag: EXEMPT bugfix
Change-Id: Ibe257752ef3c0a174e9455042082d0369ac864fb
5 files changed