RIL: handle response 3020 for RIL class

Change-Id: I8202623b46e9fb8f088542618da4207264ff3e23
msm8960: Enable tunnel audio feature

Change-Id: Ib44b1ad2ecdfd1caba3735043fb01ea5b09736a8
msm8960: Move audio_policy.conf to device common trees

m7 supports low latency, while the older S4 devices do not.

Change-Id: I356bf9ee37814cd32101d3c9281dc1faf910ea97
msm8960: use CAF media variant

Change-Id: I1779a74076793d868b230e5b7c02ad5ac5503dc9