Migrate from config.xml to SystemConfig for disabled carrier apps

Move config_disabledUntilUsedPreinstalledCarrierApps from config.xml to
system config for pixel/nexus devices

Bug: 72999375
Test: Ensure Fi is disabled by default and enabled once the Fi SIM is
       inserted

Change-Id: I594744f0cacdfefe20873118827fda501ec199fb
(cherry picked from commit eb31cd4bfed5ed23560d6618210c2ff8988ac25b)
4 files changed