GitLab

- Ensure that call actually uses H264 by checking codec type in
video track stats.

- Enable CanSetupH264VideoCallOnSupportedDevice test.

Bug: webrtc:11244, 1047994
Change-Id: I5ba241828500de9e465d5200e651640394d2ce6a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2033511Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Reviewed-by: Harald Alvestrand <hta@chromium.org>
Commit-Queue: Sergey Silkin <ssilkin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#742572}