Piping AutoMuter interface through to ViE API

This is a piece of the AutoMuter effort. A second CL will follow containing modifications to the new API, and tests.

BUG=2436
R=mflodman@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/2331004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@4899 4adac7df-926f-26a2-2b94-8c16560cd09d
7 files changed