Make sure to reset presenting application pid in case of mediaserverd crash
<rdar://83474184>
Created attachment 439331 [details] Patch
Created attachment 439334 [details] Patch
Created attachment 439346 [details] Patch
Created attachment 439352 [details] Patch
Comment on attachment 439352 [details] Patch r=me once the bots are happy
Committed r283114 (242172@main): <https://commits.webkit.org/242172@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 439352 [details].