Update Locale Based On All CellIdentities

-Update the logic to use a prioritized list of CellIdentity
 to determine Locale.
-Don't update the locale MCC when IWLAN is the only registered
 NetworkRegistrationInfo.

Bug: 148111627
Test: atest ServiceStateTrackerTest#testCellIdentitySort
Merged-In: I906692228632189e609940cfefe52d4e0ee9eb28
Change-Id: I906692228632189e609940cfefe52d4e0ee9eb28
(cherry picked from commit 917796f5)