Audio policy: modify permission needed to capture from source FM_TUNER

Capturing from source AUDIO_SOURCE_FM_TUNER is possible only via @SystemApi
on one end and does not capture from an actual on the other end.
Accordingly, do not check android.permission.RECORD_AUDIO anymore but
check privileged permission android.permission.CAPTURE_AUDIO_OUTPUT instead.
Also bypass App Ops OP_RECORD_AUDIO check which is applicable only to capture from
microphones.

Also fix audio recording permission check in MediaRecordClient to use
recordingAllowed() from ServiceUtilities

Bug: 135717621
Test: CTS tests for AudioRecord
Change-Id: Ibb1d72f018d2e3ceee195338f2e262183eee2a23