VP9 automaticResizeOn is disabled if more than one spatial layer is configured via scalability mode. Bug: webrtc:13960 Change-Id: I7c6351bca6d2f32bcc7391894e8dcc9e74ca2050 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/261315 Reviewed-by: Niels Moller <nisse@webrtc.org> Commit-Queue: Åsa Persson <asapersson@webrtc.org> Cr-Commit-Position: refs/heads/main@{#36897}