At the moment it includes:

- display name
- email
- avatar URL

This information is used *only* if no token was specified.

The welcomePageEnabled and pictureInPictureEnabled props on mobile have been
converted to feature flags.

They may contain sensitive information.

This reverts commit 603d161788.

It's possible a CallKit event arrives when the React Bridge has been torn down
and there is an assert that checks this. In order to avoid a crash, just skip
the event.

Time has come. We need to enable bitcode. It's optional for iOS targets, but
mandatory for the entire project if there is a watchOS target. Since we have a
watchOS target, it's time to enable it.

Replace the Swift array with an Objective-C one, since it's going to store
Objective-C objects and not Swift objects (or Swift objects which inherit from
NSObject, which is equivalent).

This avoids the need for JMCallKitEventListenerWrapper entirely, since an
NSArray can store NSObjectProtocol objects, unlike a Swift array, which prompted
the creation of the wrapper in the first place.

The SDK will now search for an asset called "CallKitIcon" on the main bundle,
and fallback to a built-in asset it it's not there, allowing SDK users to
customize it by just adding asset with that name.

When CallKit is enabled / disabled, a new CXProvider must be created in order to
not confuse CallKit (it misbehaves otherwise).

Ever since we switched to handling track events instead of mute actions this has
been dead code. It was also added in the wrong place, since it's responsibility
of the JS code to solve the ping-pong problem.

NSURLConnection sendSynchronousRequest is deprecated since iOS 9. Replace the
method by whjat's currently on RN master, which implements a modern alternative.

This new version comes with an updated JSC runtime, so we no longer need to
depend on the updated version ourselves.

The app should always provide them.

Consolidate all failure cases into a single one: CONFERENCE_TERMINATED. If the
conference ended gracefully no error indicator will be present, otherwise there
will be.

Since the SDK may be embedded with other apps, we need to recognize our custom
URL scheme and universal links in order to tell the user if we will process the
request or not.

Make them configurable with sane defaults.

- cleanup
- API simplification (single loadURL method)
- JitsiMeet singleton for linking helpers and globals
- Linking moved to app

RTCAudioSession is a thin wrapper around AVAudioSession provided by the WebRTC
framework. It makes some use-cases easier, and leads us closer to manual audio
unit management, which we will likely need in the near future.

Fixes this issue:

Main Thread Checker: UI API called on a background thread: -[UIApplication setExpectsFaceContact:inLandscape:]
PID: 25442, TID: 10886619, Thread name: (none), Queue name: com.facebook.react.ProximityQueue, QoS: 0
Backtrace:
4   JitsiMeet                           0x000000010a0eaadc -[Proximity setEnabled:] + 64
5   CoreFoundation                      0x00000001fea34630 <redacted> + 144
6   CoreFoundation                      0x00000001fe912450 <redacted> + 292
7   CoreFoundation                      0x00000001fe913034 <redacted> + 60
8   JitsiMeet                           0x000000010a4e08e8 -[RCTModuleMethod invokeWithBridge:module:arguments:] + 492
9   JitsiMeet                           0x000000010a4e7a10 _ZN8facebook5reactL11invokeInnerEP9RCTBridgeP13RCTModuleDatajRKN5folly7dynamicE + 248
10  JitsiMeet                           0x000000010a4e776c ___ZN8facebook5react15RCTNativeModule6invokeEjON5folly7dynamicEi_block_invoke + 88
11  libdispatch.dylib                   0x000000010b943824 _dispatch_call_block_and_release + 24
12  libdispatch.dylib                   0x000000010b944dc8 _dispatch_client_callout + 16
13  libdispatch.dylib                   0x000000010b94ce6c _dispatch_lane_serial_drain + 720
14  libdispatch.dylib                   0x000000010b94db60 _dispatch_lane_invoke + 460
15  libdispatch.dylib                   0x000000010b957bfc _dispatch_workloop_worker_thread + 1220
16  libsystem_pthread.dylib             0x00000001fe6490dc _pthread_wqthread + 312
17  libsystem_pthread.dylib             0x00000001fe64bcec start_wqthread + 4

We are going to implement the invite dialog *inside* the SDK, so there is no
need to have all this machinery anymore.

When we are in the default state (ie, not in a meeting) we shouldn't override
the AVAudioSession category and mode. It's a singleton and we might be bothering
other components of the host app which use it.

* feat(Android): implement ConnectionService

Adds basic integration with Android's ConnectionService by implementing
the outgoing call scenario.

* ref(callkit): rename _SET_CALLKIT_SUBSCRIPTIONS

* ref(callkit): move feature to call-integration directory

* feat(ConnectionService): synchronize video state

* ref(AudioMode): use ConnectionService on API >= 26

Not ready yet - few details left mentioned in the FIXMEs

* feat(ConnectionService): add debug logs

Adds logs to trace the calls.

* fix(ConnectionService): leaking ConnectionImpl instances

Turns out there is no callback fired back from the JavaScript side after
the disconnect or abort event is sent from the native. The connection
must be marked as disconnected and removed immediately.

* feat(ConnectionService): handle onCreateOutgoingConnectionFailed

* ref(ConnectionService): merge classes and move to the sdk package

* feat(CallIntegration): show Alert if outgoing call fails

* fix(ConnectionService): alternatively get call UUID from the account

Some Android flavours (or versions ?) do copy over extras to
the onCreateOutgoingConnectionFailed callback. But the call UUID is also
set as the PhoneAccount's label, so eventually it should be available
there.

* ref(ConnectionService): use call UUID as PhoneAccount ID.

The extra is not reliable on some custom Android flavours. It also makes
sense to use unique id for the account instead of the URL given that
it's created on the per call basis.

* fix(ConnectionService): abort the call when hold is requested

Turns out Android P can sometimes request HOLD even though there's no
HOLD capability added to the connection (what!?), so just abort the call
in that case.

* fix(ConnectionService): unregister account on call failure

Unregister the PhoneAccount onCreateOutgoingConnectionFailed. That's
before the ConnectionImpl instance is created which is normally
responsible for doing that.

* fix(AudioModeModule): make package private and run on the audio thread

* address other review comments

Load it at build time from a "dropbox.key" file. The file should contain the API
key in a single line.

Co-authored-by: DimaG <dgeorgiev06@gmail.com>