Revert "fixup audio_policy.conf"

This reverts commit 94bb4fdbbc5347ce045434bea8488b70ceab8d2a.
Revert "and some more for deep buffer stuff"

This reverts commit 2d359fb9a1d747a171708998c6862ce1b92b283a.
Revert "Try deep buffers for audio"

This reverts commit 3399f789f22fb24fa4982dcd86ccdbd0cd3cac76.