hal: change dts notifier nodes path to satisfy seandroid policy

Change dts notifier nodes path to /data/misc/dts/ to
satisfy seandroid policy.
Also remove AudioUtil source and header file from this project
as writing to route node is already moved to AudioPolicyManager.

Change-Id: I656e28077a6224b25e26d7476401bfb11fd141c8
4 files changed