React Navigation v6.

I'm updating to RN 0.63 instead of the latest (0.66 at the time of this writing)
so we can update the navigation related libraries to their latest versions, and
then proceed with the larger leap towards the latest RN.

* feat(security) Security Options screen

Co-authored-by: Saúl Ibarra Corretgé <saghul@jitsi.org>

This event is the event host applications need to listen to for knowing when to
dispose the SDK from now on.

Since the introduction of breakout rooms it's possible that we navigate from one
meeting to another, so there will be several conference join / terminations.

In addition, local track destruction is now moved to SET_ROOM when there is no
room, aka, we are going back to the welcome page or to the black page.

It got replaced by a feature flag.

It has been non-functional for a while.

Co-authored-by: Saúl Ibarra Corretgé <saghul@jitsi.org>

Introduce navigation for all in-conference screens.

Fixes a crash on Android

Implements: https://developer.mozilla.org/en-US/docs/Web/API/Performance
Ref: https://github.com/oblador/react-native-performance

- Remove unicode charcters from filenames
- Simplify code for copying them to the iOS SDK

Fixes several Android crashes.

Amplitude has gone back to having a separate package for RN, so switch to it.

In WebRTC M92 the RTCAudioSession lock changed from a recursive one to a regular
mutex one, so make sure we don't attempt to lock it  while already holding the
lock.

Allows for overriding any (overridable, of course) config option.