[CALL] Activate/Hold implementation.

Change-Id: I3d3c86f521885c6a1621f7ac7dd19986d7caed53
[SND] Added sound testmode packet id.
Merge branch 'experimental' of git://github.com/meron1122/bada-modemril into meron1122-experimental

Conflicts:
	libmocha-ipc/include/tapi_call.h
	libmocha-ipc/mocha-ipc/tapi_call.c