Switch to listening for CarrierConfig changes for provisioning rechecks

This change switches the signal used for provisioning rechecks from:

    ACTION_SIM_STATE_CHANGED

to:

    ACTION_CARRIER_CONFIG_CHANGED

Additionally:
    - reexamine carrier config overrides during provisioning re-checks
      (this just was never happening before).
    - refactor shared code out to VersionedBroadcastListener

Test: as follows
    - built
    - flashed
    - booted
    - runtest frameworks-net
Bug: 63400667
Bug: 67755969
Change-Id: Ib9d222eb7ca0e0dd988a1bd97ab32059189ada2c