If connectivity is lost during an outgoing call at a very early stage (the dialog has not been created yet), try to repair the call by cancelling the INVITE and issuing a new one.

Call IM Encryption Engine outoing & incoming callbacks also for composing messages, but do nothing with lime + test

Fix test: the loop for creating a random phone number was incorrect and potentally left an invalid character at the end.

Add new createFriend method for LinphoneCore to avoid crash if LinphoneFriend is not link with a LinphoneCore

This reverts commit 3e91c26f.

Fixes an issue where a stream that is removed can no longer be processed by mediarelay module of flexisip.
This is because of the a=nortpproxy that is set globally in session, that prevents Flexisip to be aware that the stream was set inactive.