[iOS] Directly use RealtimeMediaSourceCenter to compute the media capture state
<rdar://problem/53191450>
Created attachment 375367 [details] Patch
Created attachment 375369 [details] Patch
Created attachment 375412 [details] Patch
Comment on attachment 375412 [details] Patch r=me once the bots are happy
Created attachment 375415 [details] Patch for landing
Comment on attachment 375415 [details] Patch for landing Clearing flags on attachment: 375415 Committed r248161: <https://trac.webkit.org/changeset/248161>
All reviewed patches have been landed. Closing bug.
Reopening to attach new patch.
Created attachment 375435 [details] Build fix
Comment on attachment 375435 [details] Build fix Clearing flags on attachment: 375435 Committed r248170: <https://trac.webkit.org/changeset/248170>