add advanced settings

(cherry picked from commit 35ada721a9f991699e1ce470e77f77b7bb99ff8b)
update klte settings

(cherry picked from commit d667c77a48819d7e54e68a49f5d1efb2130e8f1e)
use stock mixer_path and audio_policy.conf

(cherry picked from commit 3080373f47d8eb1a77a0eb17ba748b7d49f1150c)