Mobile looping sounds

Up until now, mobile was oblivious to participants' presence state. Presence
state handling is required (probably, amongst other things) for "call flows".
So, let's add it! This is done by gathering the presence state when a
participant first joins, and handling subsequent changes.

Fix the "mute ping pong" for once and for all. This patch takes a new approach
to the problem: it keeps track of the user generated CallKit transaction ations
and avoids calling the delegate method in those cases.

This results in a much cleaner and easier to understand handling of the flow: if
the delegate method is called it means the user tapped on the mute button. When
we sync the muted state in JS with CallKit the delegate method won't be called
at all, thus avoiding the ping-pong altogether.

In addition, make sure all CallKit methods run in the UI thread. CallKit will
call our delegate methods in the UI thread too, thsu there is no need to
synchronize access to the listener / pending action sets.

Not all TRACK_ actions include the `local` attribute, so use the underlying
`jitsiTrack` to check it.

* ref(video-layout): move middleware for TRACK_ADDED

* ref(video-layout): call mucJoined when redux knowns of conference join

old values: 0-39% -> red, 40-69% -> yellow, 70%+ -> green
new values: 0-9% -> red, 10-29% -> yellow, 30%+ -> green

This is needed for newer versions of electron that might
use the iframe integration of jitsi-meet. Newer versions
seem to have some kind of regression with setting height
and width to 100%.

* ref(info): use conference existence as trigger for autoshowing dialog

* squash: combine maybeShow checks, inheritdoc

* squash: flow type tweaks

grammar and spelling fixes

* feat(settings): setting dialog

- Move device selection, profile edit, language select, moderator
  options, and server auth into one modal with tabs.
- Remove side panel profile and settings and logic used to update
  them.
- Pipe server auth status into redux to display in the settings
  dialog.
- Change filmstrip only device selection popup to use the new
  stateless settings dialog component.

* squash: do not show profile tab if not guest

* squash: profile button not clickable if no profile to show

* squash: nits

* ref: Settings dialog.

The original presence stanza generation code for a poltergeist
has been re-factored and simplified a bit. Every time a
poltergeist presence is updated we first check that the poltergeist
still exists.

On web CONFERENCE_FAILED handlers are not setting the 'recoverable'
flag thus any middleware which rely on those should not execute on web.

Connection corner cases

Emits CONFERENCE_FAILED in response to CONNECTION_FAILED event
which then triggers JitsiConference.leave() through the middleware
processing. Also base/conference state will be adjusted. It is to have
a consistent redux state in which both connection and conference are
failed. It could happen that in a buggy environment the XMPP connection
is dropped, but the media is still flowing which would result in weird
user experience.

The change to mobile/external-api is required to not emit
CONFERENCE_FAILED for CONNECTION_FAILED if the conference has been
started, because base/conference state will still hold conference
instances which are to be ended by other means and result in the
appropriate event (which will adjust the base/conference state).

Updates lib-jitsi-meet to have the getConnection getter in
JitsiConference.

Currently the listeners for disconnected and failed connection events
are unsubscribed as soon as the connection is established, so
the CONNECTION_DISCONNECTED is never triggered which would clear the
'connection' field. This commit will clear the 'connection' state on
CONNECTION_WILL_CONNECT. It's needed anyway given that there's no
guarantee on when and if the async disconnect operation will finish.

One issue caused by the 'connection' not cleared was that
CONNECTION_FAILED was not reduced correctly and the reload screen was
not displayed for the following scenario:
1. Join and leave any working conference.
2. Turn off network connectivity on the device.
3. Wait for CONNECTION_FAILED. The reload screen will not be displayed,
   because CONNECTION_FAILED is not reduced correctly, because the old
   'connection' value is still there.

Your truly introduced this regression in
8c7a3f16b1, alas.

The audio only mode is used to set the CallKit call type. This affects the
behavior on the recent calls entries (calls are marked either as audio or video
calls).

Sync both at the start and for transitions. The previous code was working by
chance (in a way): when the CallKit UI is presented the local video is muted,
which triggers a SET_VIDEO_MUTED action, at which point the audio-only mode was
checked for. Now we are more explicit and act on SET_AUDIO_MUTED.

Rely solely on actual track state, rather than the desired state, (what
base/media represents).

Read the muted state from the track itself instead of from base/media. This
avoid expressing the incorrect desire when the call starts muted because
permission was never granted.

Audio muting does not have an authority.

* ref(large-video): permanently enable canvas based background

* squash: leave flag for disabling background

In the current middleware logic, when the local participant becomes
dominant speaker, a new participant can be selected to receive
high quality video from. This means large-video could potentially
do a switch to another participant when the local participant
becomes dominant speaker. Prevent such behavior.

* Adds an option to disable features based on token data.

Reverts changes from b84e910086, removes disableDesktopSharing option and an interface_config option.

* Disable recording button based on token features data.

Hide recording if local participant isGuest and roles based on token.
When enableUserRolesBasedOnToken is enabled we were not hiding the record button for guests.

* Adds filtering of jibri iqs and rayo based on features.

Moves feature checking in separate utility function.
Renames utility method.

* Adds a footer text when outbound-call is not feature enabled.

* Fixes comments.

feat(eslint): use new eslint-config-jitsi

It contains all the rules we use, minus the react-native specific ones, which we
are keeping here.

They are automatically created by precommit-hook:
362a202498/bin/install (L5-L6)

Turns out sometimes a calendar is missing the tile and it crashes because nil is
inserted into a NSDictionary. Fix it by applying this pending PR:
https://github.com/wmcmahan/react-native-calendar-events/pull/164

Maybe there is a case that can be triggered somehow where
the toolbar becomes off center.