[WebXR] Allow audio and media sessions to continue uninterrupted when starting immersive WebXR sessions
<rdar://problem/102391109>
Pull request: https://github.com/WebKit/WebKit/pull/24385
Committed 274742@main (76e52d168312): <https://commits.webkit.org/274742@main> Reviewed commits have been landed. Closing PR #24385 and removing active labels.
*** Bug 274385 has been marked as a duplicate of this bug. ***