Adding additional prompt to UsbPermissionsDialg for audio devices.

To support, adding members to UsbDevice to mark devices as having audio
playback and audio capture capabilities.

Bug: 136080195
Test: Run "UsbAccess" test bed. Connect audio and non-audio USB devices
and see the additional prompt shown/not-shown.

Change-Id: Ie7c614d9ed30a163c350b18a54b8a9115698779d