State management for satellite configs

PLMN specific satellite configs are updated which can later be used
in several satellite flow decision points -- for example whether
the emergency call handover should be T911/eSOS based on PLMN.

Bug: 433484496
Flag: EXEMPT bugfix
Test: atest SatelliteControllerTest

Change-Id: I06e2e647493179fb8e07990f3c8d665b2086c14c