audio policy: finish audio record op when silencing recording

In order to correctly reflect microphone access, the permission
service must be notified of operation finish/start when an AudioRecord
is silenced/unsilenced by the concurrent capture policy.

Bug: 190517602
Test: smoke audio tests for audio capture
Change-Id: Ia4a09111735356d11c6c8c794048e32dbc29bdcd
2 files changed