klte-common: update gain for mixer path vr-main-mic to match stock

* recordings with the Voice Recorder app were very low, increase to
match that of stock.

Change-Id: Ia0d036e5c8bad00a8ae99e93b4ce8a60cddb34e1
klte-common: add 3rd mic to audio policy

Change-Id: Iea686ed53a08b8346c7b3617e151f03fee36edd5
klte-common: set voice wakeup to 1

Change-Id: I0c29011d763342b2a13c5358767a49149d0749df