Fix simulcast svc controller to reuse dropped frame configuration, same as full svc and k-svc controllers do. This fuzzer reminded the issue was still there. This is a reland of https://webrtc-review.googlesource.com/c/src/+/212281 Bug: webrtc:11999 Change-Id: Id3b2cd6c7e0923adfffb4e04c35ed2d6faca6704 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/215921 Reviewed-by: Erik Språng <sprang@webrtc.org> Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Cr-Commit-Position: refs/heads/master@{#33802}