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: I96ab23c304a07264fdd61b43722b997456a13e2c
Merged-In: I96ab23c304a07264fdd61b43722b997456a13e2c