Reason for revert: Broke import. Implementations of the old interface still exists somewhere. Original issue's description: > Remove the deprecated EncodeInternal interface from AudioEncoder > > Also hid MaxEncodedBytes by making it private. It will get removed as soon as subclasses have had time to remove their overrides. > > BUG=webrtc:5591 > > Committed: https://crrev.com/5222d315dbea8f3563c100cc9f2451907f70b05f > Cr-Commit-Position: refs/heads/master@{#12329} TBR=kwiberg@webrtc.org,solenberg@webrtc.org # Skipping CQ checks because original CL landed less than 1 days ago. NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true BUG=webrtc:5591 Review URL: https://codereview.webrtc.org/1883543002 Cr-Commit-Position: refs/heads/master@{#12330}