add setMuteState framework changes

previously, there was no way to mute a Transactional call via the
CallControl object.  In order to mute the call, the AudioService
was needed.

Now, clients can use CallControl#setMuteState to mute the call.

Fixes: 310669304
Test: 1 new CTS test
Change-Id: I7b5d834b8073dd8fbae07d31722aa8f54a88b26e
3 files changed