Revert "Revert "build audio_policy.msm7x30""

This reverts commit d70340db634ff20997d99e2fd4fa27fbd9906c2c.
partially revert audio_policy.conf changes and do something based on tuna

Change-Id: I0452a5341833709fb397ef665e7a060ebe72bc4f
Merge branch 'cm-11.0' of https://github.com/Mustaavalkosta/android_device_htc_msm7x30-common into cd-4.4