CoreAudioSharedUnit should not clear its persistentID when device capture changes
<rdar://83729357>
Created attachment 440333 [details] Patch
Refactoring at https://bugs.webkit.org/show_bug.cgi?id=231284 should allow us to avoid this kind of regression
Committed r283628 (242580@main): <https://commits.webkit.org/242580@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 440333 [details].