The "at target quality" attribute is no longer set to the encoded
image in VideoStreamEncoder, see
https://webrtc-review.googlesource.com/c/src/+/359640
Mark the attribute as deprecated to avoid new dependencies and prepare
for deletion.
Bug: chromium:359410061
Change-Id: Id5a98ec9d2068099cb75a70b849bbf1c77feabb3
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/359660
Commit-Queue: Johannes Kron <kron@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#42848}
0b91688817