The "initialize audio/video" parameters are no longer needed, but at the same time were required to be true, causing a lot of confusion. This CL removes them, but leaves the old method signature around, marked "deprecated". BUG=webrtc:3416 TBR=solenberg@webrtc.org Review-Url: https://codereview.webrtc.org/2800353002 Cr-Commit-Position: refs/heads/master@{#17626}