[MSE][GPUP] SourceBufferPrivateAVFObjC does not work properly when audio and video exchange their track IDs
<rdar://81465248>
Created attachment 436641 [details] WIP patch
Created attachment 436792 [details] WIP patch. Need a test.
Created attachment 437045 [details] [fast-cq] Patch
The mac-debug-wk1 failures are not related to this patch. See: <https://trac.webkit.org/changeset/281934/webkit>
Committed r281948 (241256@main): <https://commits.webkit.org/241256@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 437045 [details].