Non-framework location management - remove roaming handling

Remove code that detects roaming and disables non-framework
location access for the entities represented by the configured
proxy apps. It was decided in the PWG meeting that detecting
and notifying the user for consent for a combination of cases
involving SIM change, multi-SIMs, roaming, different work
profiles is complex and instead have the proxy app include
text that any carrier the phone connects to can access the
device's location depending on the location permission settings
of the configured proxy app.

Bug: 122856189
Test: Verified that removal of this roaming code does not affect
      other non-framework location management features.

Change-Id: I4ec741bcf71ff0743fa4a026d6572d01a95eb03e