Register network_carrier_aware_avoid_bad_wifi setting change callback

This commit registers the "network_carrier_aware_avoid_bad_wifi" URI
with the ContentResolver to allow for monitoring changes to this
specific Global.Settings entry.

Flag: EXEMPT mainline
Test: atest ConnectivityCoverageTests:android.net.connectivity.com.android.server.connectivity.MultinetworkPolicyTrackerTest
Change-Id: I0e9161c5390b71e5c3ecac89613aa042f40ab695
2 files changed