* Adds notifications for who stop/start recording/live streaming.

* Updates to latest lib-jitsi-meet.

React Native doesn't define __filename nor __dirname so do it artisanally. In
addition, this helps with centralizing the configuration passed to loggers.

* Adds live streaming sound notification.

* Adds ios resources for the new files.

* Removes unused translations.

* Fixes using translated strings.

* Moves using latest i18next versions and stop using compatibility modes.

* Sorts i18next options.

* Fixes defaultNS used by i18next.

This is used when translating html tags with data-i18n keys as attributes, used by jQuery-Impromptu.

🔥🔥🔥

Using anything non-serializable for action types is discouraged:
https://redux.js.org/faq/actions#actions

In fact, this is the Flow definition for dispatching actions:

declare export type DispatchAPI<A> = (action: A) => A;
declare export type Dispatch<A: { type: $Subtype<string> }> = DispatchAPI<A>;

Note how the `type` field is defined as a subtype of string, which Symbol isn’t.

* Updates recording dialog.

* Update config.js doc.

* Adds comment and make a check more intuitive.

* Changes of using enum for recording types.

Using an array of styles in Firefox causes an error
that triggers jitsi-meet to redirect to a static page.

- remove unneeded dialog (it's taken care of by StartRecordingDialogContent)
- pass correct props so integrations (Dropbox) show up

There was a missing delegate method call into RNGoogleSignIn, which fixed this.

It's possible for the YouTube api to return zero broadcasts
or broadcasts without any streams--streams are what are
associated with stream keys. In this case, instead of showing
an empty selector or no selector, show a message with a link
to where the stream key can be obtained.

Provide a client-side notice if the YouTube live stream key
looks like it might be in the wrong format. Normally the
stream key looks like 4 groups of 4 numbers and letters,
each separated by a dash. The warning does not block submission
in case YouTube changes their stream key format.

For the most part the changes are taking the "static propTypes" declaration off
of components and declaring them as Flow types. Sometimes to support flow some
method signatures had to be added. There are some exceptions in which more had
to be done to tame the beast:
- AbstractVideoTrack: put in additional truthy checks for videoTrack.
- Video: add truthy checks for the _videoElement ref.
- shouldRenderVideoTrack function: Some component could pass null for the
  videoTrack argument and Flow wanted that called out explicitly.
- DisplayName: Add a truthy check for the input ref before acting on it.
- NumbersList: Move array checks inline for Flow to comprehend array methods
  could be called. Add type checks in the Object.entries loop as the value is
  assumed to be a mixed type by Flow.
- AbstractToolbarButton: add additional truthy check for passed in type.

It doesn't seem to work properly.

That is only required if we'd want our backend to authenticate on behalf of our
users. If the app is to authenticate directly it's not needed.

This involves redesign of the web recording dialog in order to look the
same as the mobile one.

* Disable buttons only when token features is enabled. Fixes #3355.

* squash: update disabled check.

* squash: update disabled and disabledByFeatures.