void making the assumption that the first 2 video streams are the main stream the the thumbnail of the local participant

Fix typo

Delete findOneToOneChatRoom from private API
Do not check subject for one to one chats

Add boolean value to know when the addition of a new endpoint has already been notified by the user XML

(cherry picked from commit c26adf04)

EndToEnd

This is a simple way for applications to index a chatroom or
conference provided by the SDK.
Applications can also retrieve a chatroom or conference object by providing its identifier

Ensure that linphone_core_search_chat_room_2 doesn't do a SIP address comparison as stated in the RFC. In fact, doing that leads to being too exposed to server instabilities.
For example, if a server for whatever reason removes the conf-id parameter from the chatroom peer address, it will prevent to client to join any new chatroom as all will match the corrupted chat

Add class ConferenceContext to easily compare two chatrooms or
conference based on the parameters, local and remote address and the
participants

state change

At startup, set all media conference supporting chat capabilities to
Terminated and reset the last notify ID

Free transient messages and events as soon as the chatroom moved into the Deleted state. The application might still keep a reference preventing the immediate destruction

scenarios:
- the client requested a full state
- the server sends a full state to catch up a big number of missed
  events.

In order to detect the latter case, the client looks if its current last
notify ID is not 0

Use parameters passed down by the application to join a group call after it has been created on the server

Rework impromptu conference tests to avoid using the conference
scheduler to create such conferences. Use instead the method
linphone_conference_invite_participants

- Added a null check for `remoteAddress` before using it.
- Now logs an error and skips `authenticationRejected()` if `remoteAddress` is null,
but still ensures `propagateEncryptionChanged()` is executed.

Added a null check in `CorePrivate::registerListener` to avoid registering a `nullptr`.
Logs an error message and returns early if `listener` is null.

Take into account conference capabilities in the NOTIFY full state if
the conference supports medias

Modified `Core::createXmlFromEktInfo` to take an explicit `Account` parameter instead of retrieving the default account internally.

iOS: make the IosPlatformHelper a CoreListener, in order to register for push only when core is in GlobalOn state. This fixes a bug where, when using remote provisioning, push token could be lost.

linphone_account_normalize_phone_number() need a username.

Make the best effort to find a conference that can be linked to an INVITE session. In some cases, the account contact address doesn't match neither the conference ID peer address nor the conference address therefore the core now looks also at the To or From headers

Add backward compatibility code for tchat conference server based on SDK release/5.3. In fact, the GRUU parameter must be added to the To header of a SUBSCRIBE and MESSAGE messages
Comment code needed to remove the gr parameter from the conference address and conference ID that can be used once a tchat flexisip conference server based on SDK 5.4 will be released

Add setting to keep GRUU in chatroom and conference addresses and conference IDs

Do not use anymore local address as contact address of SUBSCRIBE and PUBLISH messages

Add useful linphone_participant_device_get_participant() method.
Fix a random crash.

Fix documentation of onActiveSpeakerParticipantDevice callback as the pointer to the device can be NULL. It occurs when the active speaker leaves the conference

Fix constness and by-reference small issues, avoid reloading FriendList when no DB migration from legacy DB is done.