307a0922c5
Applications can choose to decide when to give up control of the AVAudioSession to WebRTC. Otherwise, behavior should be unchanged. Adds a toggle to AppRTCDemo so developers can see the different paths. BUG= R=haysc@webrtc.org Review URL: https://codereview.webrtc.org/1822543002 . Cr-Commit-Position: refs/heads/master@{#12080}