msm8974: sepolicy for display tuning knobs

Change-Id: I1cbf3a8e9aeef65a7302d9acaabcb82f06a9aaa9
msm8974: use 48KHz sampling rate for A2DP

This is to match

http://review.cyanogenmod.org/#/c/80463/

Change-Id: Ie706b5a252131bbc5fd6279d64f0bebbec3c6fb2
Revert "audio properties: Disable av offload temporary"

This reverts commit 8275e7069ada592864be6bce35c9e278f46deabe.