audio: remove otter specific audio moving to common

Change-Id: Id538d5a2393ce3b5a76c0357bb30f612f10529e0

Conflicts:
	audio/audio_policy.conf
audio: update otter specific audio policy and routing paths

Change-Id: I17c8625cf96ac2ad9de8cf56ae8e2d5dd05f2b99

Conflicts:
	prebuilt/etc/audio_policy.conf