[Cocoa] EME with encrypted MPEG2-TS fails to begin playback
<rdar://problem/122030589>
Pull request: https://github.com/WebKit/WebKit/pull/24043
Committed 274351@main (12dd6bd4eb2d): <https://commits.webkit.org/274351@main> Reviewed commits have been landed. Closing PR #24043 and removing active labels.