Eliminate AcmGenericCodec::Add10MsData

All encoding work is now done in the Encode function.

Note: This CL leaves a technical debt in
AudioCodingModuleImpl::Add10MsData. This will be fixed in later
changes.

COAUTHOR=kwiberg@webrtc.org
R=jmarusic@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/46419004

Cr-Commit-Position: refs/heads/master@{#8594}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8594 4adac7df-926f-26a2-2b94-8c16560cd09d
5 files changed