- Removes voe_conference_test. - Adds a new AudioStatsTest, with better coverage of the same features, based on call_test. - Adds an AudioEndToEndTest utility, which AudioStatsTest and LowBandwidthAudioTest uses. BUG=webrtc:4690 R=kwiberg@webrtc.org Review-Url: https://codereview.webrtc.org/3008273002 . Cr-Original-Commit-Position: refs/heads/master@{#19833} Cr-Mirrored-From: https://webrtc.googlesource.com/src Cr-Mirrored-Commit: 73276ad7ed1e70ab764cd02d7189ed5839fadc20