Use PermissionChecker (av) in captureAudioOutputAllowed method

PermissionChecker now includes some higher level logic for allowing the
HotwordDetectionService to grant CAPTURE_AUDIO_OUTPUT permission.

We have a similar change to grant RECORD_AUDIO and CAPTURE_AUDIO_HOTWORD
permissions to HotwordDetectionService before.
(ag/14427323 and ag/14883678)

Bug: 228328385
Test: atest CtsVoiceInteractionTestCases
Change-Id: I1b23f6af75bd680ff8c3a58b357668678238f591