Return an error when greater than 16 kHz is used with AECM.

BUG=chromium:178040

Review URL: https://webrtc-codereview.appspot.com/1146005

git-svn-id: http://webrtc.googlecode.com/svn/trunk@3587 4adac7df-926f-26a2-2b94-8c16560cd09d
3 files changed