c01c6a423c
This is a first draft of what we're hoping to use to create all AudioDecoder instances. Follow-up CLs will start using this internally in NetEq instead of calling constructors manually. BUG=webrtc:5801 Review-Url: https://codereview.webrtc.org/1917163002 Cr-Commit-Position: refs/heads/master@{#12548}