Pass the Config down to all AudioProcessing components. Also add an EchoCancellationImplWrapper to optionally create different EchoCancellationImpls. BUG=2117 TBR=turaj@webrtc.org TESTED=git try Review URL: https://webrtc-codereview.appspot.com/1843004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@4400 4adac7df-926f-26a2-2b94-8c16560cd09d