These parameters allow to configure number of simulcast/spatial layers in video codec tests. Bug: webrtc:8524 Change-Id: Iad1332732758a8297abcf740c24c483e5fccec9a Reviewed-on: https://webrtc-review.googlesource.com/43020 Commit-Queue: Sergey Silkin <ssilkin@webrtc.org> Reviewed-by: Rasmus Brandt <brandtr@webrtc.org> Cr-Commit-Position: refs/heads/master@{#21741}