Add permission caching to PermissionController

Audioserver currently calls upwards to system_server for all permission
checks.

Invert the call direction, and maintain mapping of uids which hold a
particular permission. Add AIDL interface for system_server and enum
representing relevant permissions.

Test: atest audiopermissioncontroller_test
Bug: 338089555
Flag: com.android.media.audio.audioserver_permissions
Change-Id: I45be63217fa58544e6dd9530a5d9e29b99f31ade