t0lte: partial revert of audio boost

- revert headset audio level
- drop speaker boost down a notch

Change-Id: Ic187a632e1519c88bb0bf2d4b536766a5ee9ab71
Merge "t0lte: partial revert of audio boost" into cm-11.0
Merge remote-tracking branch 'github/cm-11.0' into cm11