Refactored area update info support

1. Refactored area update information support so it
   is not limited to channel 50 and Brazil.
2. Added channel 60 for India.

Test: Manual
bug: 37746109
Merged-In: Ic1c4683ecfe0556547ba15eb9b9e780644f17bff
Change-Id: Ic1c4683ecfe0556547ba15eb9b9e780644f17bff