Use Parcelable CellIdentity instead of CellLocation in AIDL.

Currently CellLocation is passed over AIDL by manually
marshalling/unmarshalling to/from Bundle, and type info
is not preserved in the process.

Bug: 146092124
Test: make
Merged-In: I029ad5301d59f904923c8a691b6d5fdf47e96b71
Change-Id: I029ad5301d59f904923c8a691b6d5fdf47e96b71