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: I8d5d828ec142c74428388a6d3f11cdf0842e03b9
Merged-In: I8d5d828ec142c74428388a6d3f11cdf0842e03b9