This helps Java encoders take action if simulcast is enabled or not.
Bug: webrtc:9646
Change-Id: Iad967e237bdc790ff2af111bdec1319f3e661ff7
Reviewed-on: https://webrtc-review.googlesource.com/95651
Reviewed-by: Magnus Jedvert <magjed@webrtc.org>
Commit-Queue: Rasmus Brandt <brandtr@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24430}