Fix crash when replaying BWE using Scream

Bug: webrtc:447037083
Change-Id: I6c0d481d909fbeb4cff38e6ed56d45cc2c93e364
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/440945
Commit-Queue: Per Kjellander <perkj@webrtc.org>
Commit-Queue: Björn Terelius <terelius@webrtc.org>
Reviewed-by: Björn Terelius <terelius@webrtc.org>
Auto-Submit: Per Kjellander <perkj@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#46632}