* feat(RTC) drop PERMISSION_PROMPT_IS_SHOWN event

It was never accurate since browsers have changed their behavior over
time and can be implemented in the application more reliably.

* squash: Update JitsiMeetJS.ts

* squash: Update hand-crafted JitsiMeetJS.d.ts

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Co-authored-by: Дамян Минков <damencho@jitsi.org>