Supersedes: https://github.com/jitsi/jitsi-meet/pull/4818
Fixes: https://github.com/jitsi/jitsi-meet/issues/4812

It was introduced in Xcode 9 and made the default in Xcode 10. We were forcing
the use of the legacy version, which doesn't support some new features that we
wish to enable, such as building the SDK for distribution.

Matches the app / SDK deployment target and avoids compilation warnings.

It crashes on Android. Well, on the JSC version React Native uses on Android.

While we could use this fallback only on Android, we have decided to use it
on all mobile platforms for consistency.

iOS 10 crashes, so don't use it there, in any case.

Currently only 2 options are implemented, mainly aimed at helping troubleshoot
audio related problems:

- Disable native call integration (it disables CallKit / ConnectionService)
- Disable P2P

Separate each implementation (3 as of this writing) into each own "handler"
class.

This should make the code easier to understand, maintain and extend.

* first pass at mod_muc_domain open source plus example

* doc - prosody config and config.js examples for mapper

- Remove network-activity "feature"
    - It wasn't in use
    - It relied on internal React Native components, bound to break anytime
- Show an infinite loading indicator
- Style it just like the LoadConfigOverlay
    - Since it kinda represents the opposite, an "unload" then SDK is done

Skip the first character, since it's now like ^123456.0.0

Fixes a crash on iOS when disposing streams.

Fixes showing etherpad in follow-me mode.

fix: fix and refactor AoT css

decodeURIComponent is not needed any more and after adding a validation such meeting name should not happen to be stored.

If action is null (observed on some old devices) we'll get an exception.
Reversing the check fixes it since Actions.XXX is statically defined.