[v2] fast/mediastream/device-change-event-2.html is flaky
<rdar://problem/118675428>
Pull request: https://github.com/WebKit/WebKit/pull/20774
Committed 271012@main (0761ccfa932e): <https://commits.webkit.org/271012@main> Reviewed commits have been landed. Closing PR #20774 and removing active labels.