hal: Enhance voice concurrency support for 8916

- All VoIP, compress, deep buffer, record usecases need to close
before voice call setup and don't allow these usecases during
voice call on 8916.
- setMode(IN_CALL) itself is not sufficient to know if we are
in actual voice call.
- Add keyvalue parameters support to know if we are in voice call
and policy hal can query the same and make decissions based on it.

CRs-Fixed: 662804
Change-Id: I20d660fadd07c4d227a7e3dfe356fc39806ca167