* feat(tile-view): initial implementation for mobile

- Create a tile view component for displaying thumbnails in a
  two-dimensional grid.
- Update the existing TileViewButton so it shows a label in the
  overflow menu.
- Modify conference so it can display TileView while hiding
  Filmstrip.
- Modify Thumbnail so its width/height can be set and to prevent
  pinning while in tile view mode.

* use style array for thumbnail styles

* change ternary to math.min for expressiveness

* use dimensiondetector

* pass explicit disableTint prop

* use makeAspectRatioAware instead of aspectRatio prop

* update docs

* fix docs again (fix laziest copy/paste job I've ever done)

* large-video: rename onPress prop to onClick

* change forEach to for...of

* use truthy check fallthrough logic instead of explicit if

* put tile view button second to last in menu

* move spacer to a constant

* the magical incantation to make flow shut up

[RN] Add calendar invite

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

* squash: update disabled check.

* squash: update disabled and disabledByFeatures.

fix(subtitles): fix typo that was blowing away subtitles on update

* feat(tile-view): exit tile view on pin

* Try out this other ux impl

Long meeting titles and urls can force text outside of the
tile.

Update the following to the latest:
avatar
button
checkbox
field-text
field-text-area
icon
inline-message
layer-manager
lozenge
modal-dialog (one version before breaking changes)
multi-select
spinner
theme
tooltip

The following were not updated:
- droplist was removed because usage could not be found
- flag was not updated due to regressions with stacking animations
- inline-dialog was not updated because it requires (likely simple)
  fixing of position props

* Adds dial in default number and pin to the text for calendar/share.

* Handles fail to fetch numbers or conference id.

Since they are a language feature, they make the source code more easily
comprehensible than `if (typeof XXX === 'undefined') { XXX = ...; }`.

The styles.actionColumn does not exist. It looks the same without the
extra View.

Moves NotificationContainer to the toolbox and filmstrip container, so
that there's no need to manually calculate the positions.

The outer container is not necessary if 'justifyContent: flex-end' is
used with the absolute fill on the main container.

Extracts methods which share the common logic. There are still some
leftovers on the web side left which are not used on RN. But this can be
a first step.

It causes false positives when submitting the app to the Store. Use the new
permissions API in react-native-webrtc instead.

It includes a W3C-ish permissions API which we will leverage.

Since this is a feature implemented in the SDK, it makes sense that all the
plumbing required to make it work it's in the SDK itself.

This makes the PermissionsAndroid builtin module work.

Introduce the JitsiMeetActivityInterface, which defines the interface that
activities using JitsiMeetView directly must implement in order to ensure full
functionality.

Queue replaceLocalTrack

The process for doing a replaceLocalTrack is async. Is it
possible to trigger replaceLocalTrack multiple times before
each call is finished. This leads to situations where
replaceLocalTrack is called multiple times with oldTrack being
null and a new track. In this scenario, each new track will be
added, causing UI issues such as the local participant's
large video not displaying for remote participants.

The action replaceLocalTrack is used when unmuting audio or
video, when creating new tracks on device switch, and when
toggling screensharing. These actions can collide with each
other. One way to fix this would be to queue replaceLocalTrack.

The instance variable is not accurate. By default isVisible is
set to false but nothing sets the video container to actually
not be visible. As such it is possible for the video element
itself to autoplay, thereby making video visible, while the
isVisible boolean is still false. The fix chosen is to remove
instance variable and always respect calls to show/hide so
that the video container can be set to hidden.

* Add joing button to the calendar events.

* Add space between calendar lines.

* Adjust recent list name.

* Fixes test failure.

* Restyle mobile recent list message.

* Add analytics events.

* Addressing PR review comments.

LeakCanary is a memory leak detection library which will run only in Debug mode.

* feat(tile-view): persist setting in local storage

* comment

Fixes a memory leak in Android: https://github.com/DylanVann/react-native-fast-image/pull/214

We are using our fork which is 4.0.14 + the leak fix because the last version
(5.0.3 at the time of this writing) contains a bug that prevents us for using
it: https://github.com/DylanVann/react-native-fast-image/issues/208

The border changes the tile sizing, due to box-sizing, and that
messes with the video aspect ratio.

Required due to API changes for promises support.