Reland "WebRtcVoiceMediaChannel::AddRecvStream: Don't call SetRecPayloadType"

BUG=webrtc:5805

Review-Url: https://codereview.webrtc.org/2774833003
Cr-Original-Commit-Position: refs/heads/master@{#17391}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 1c07c70d88eca07888bf242921dc8dfc3be95737
29 files changed