Move functions Set/PrintCodecSettings, NumberOfTemporalLayers to TestConfig. Add function NumberOfCores. Bug: none Change-Id: Ic33d79681d59d62bf34d9c9ff056a751ed3f8da8 Reviewed-on: https://webrtc-review.googlesource.com/13120 Commit-Queue: Åsa Persson <asapersson@webrtc.org> Reviewed-by: Rasmus Brandt <brandtr@webrtc.org> Cr-Commit-Position: refs/heads/master@{#20358}