msm8974: Move audio_policy.conf out of common repo

Change-Id: I731354ef4d13d0915fbb00123f75d4f573b56c10
msm8974: Enable multiaac codec

 * Fix "oneplus-goes-boom" DSP crash.

Change-Id: I282a03d00f9af6290464a0544f9168e0cea82fa8
msm8974: Enable WMA DSP codecs

Change-Id: Ic6dafcb823c1095e2f114f311c50faaf50352e16