Add new method 'linphone_call_request_notify_next_video_frame_decoded(LinphoneCall *call)' that is missing to compensate the deprecation of linphone_call_set_next_video_frame_decoded_callback().
Due to this lack, some tests were failed.

Reply 489 Bad Event if we receive a NOTIFY in a call for anything else than a "refer" event package. This commit is also made in master branch.

Reimplement ip version selection for outgoing calls. This corresponds to commits 3fd706a7 and 08a66cdf of master branch.

fix(core): fix downloadFile method, returns bool instead of int! There is no reason to return -1 on error like a C function

Fix issue 4893: After being re-invited in a chat room, when the device is restarted nothing can be done in the chat room.

Store the conference created event in DB and update the notify id in DB if insertion of the chat room is requested but it is already stored.