hammerhead: enable volume rocker wake setting

Change-Id: I29b1c5087744056a714677f011125bc7df1069e2
audio_effects: Add stereowide effect

Change-Id: I5238369a4b04d0061b51313a99edb05932fc927b
Enable gcc 4.8

Change-Id: I4fec10e41b2b676b9f70dba9e304e6833735c853