RILs: Eliminate repeated overrides of responseOperatorInfos.

- Add mQANElements field, default to 4 in RIL, use in responseOperatorInfos.
  This may be set to 5 in subclassed RIL constructors.

- Remove repeated overrides of responseOperatorInfos by subclassed RILs, as
  there's no logic change, just a disagreement as to whether the
  QUERY_AVAILABLE_NETWORKS response is an array with 4 or 5 per-network
  elements.

- Size OperatorInfo ArrayList appropriately in SemcRIL and SonyQualcommRIL.

Change-Id: I1254a670d8611f76aad13a6f197c67012c7d4c47