dlx: Disable audio features that aren't yet supported

Change-Id: I27c01155d8df84f578a791b421d460a73ceae314
dlx: Remove hce permission

Change-Id: Ia551c8d9f5b6d5deb985eff479db5f5a7ce02514
dlx: Resort audio_policy.conf to be closer to m7

Change-Id: I464b9af8f48b97dfa672057ef3b61a2950aed89b
dlx: Update audio policy

Conflicts:
	configs/audio_policy.conf

Change-Id: Ia0bea6581d6461cbb5f63a03dd69af95741224ef
Fix misc fails.
-Add kernel headers
-Disable currently unsupported overlays
-Set preferred AAPT to xxhdpi only