Remove ViE interface usage from VideoReceiveStream.
Remove ViE interface usage from VideoReceiveStream.

References channels and underlying objects directly instead of using
interfaces referenced with channel id. Channel creation is still done as
before for now.

BUG=1695
R=stefan@webrtc.org
TBR=mflodman@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/46849004

Cr-Original-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#8958}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 76c53d36bc455fe89ca1f860d5171633198fe907

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