Add appops for audio hardening

Add two internal appops associated with audio hardening work.

OP_CONTROL_AUDIO is the primary op, which will be associated with a
capability.  OP_CONTROL_AUDIO_PARTIAL is the secondary op, which will is
FOREGROUND without a capability.

OP_CONTROL_AUDIO may eventually be exposed in the special app access
menu in settings.

The implementation will be flagged rather than the definition since
these are not APIs.

Test: atest AppOpsDefinitionTest
Bug: 376480814
Flag: com.android.media.audio.hardening_impl
Change-Id: I69a5cae3a37968176198c938f9a5077e7750d595