Added multi-band support

One cell could have multiple bands assigned.
One frequency could be shared by multiple bands
because they have overlapping.

Test: Telephony sanity tests.
Bug: 131061889
Change-Id: I6018b9df8b8bd0745c3736df764f4569bea28baa
Merged-In: I6018b9df8b8bd0745c3736df764f4569bea28baa