With visibility restricted to modules/video_coding/. Also drop some unneeded dependencies on system_wrappers. Bug: webrtc:3380 Change-Id: If3b64396953a026bede09c9fb5eb06cfc4c29f3a Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/130104 Reviewed-by: Rasmus Brandt <brandtr@webrtc.org> Commit-Queue: Niels Moller <nisse@webrtc.org> Cr-Commit-Position: refs/heads/master@{#27344}