Sending a reINVITE request when a previous one is not finished
cause both requests to be aborted (second one by PJSIP, first as
all ICE sockets are destroyed by caller).

Note: this is not a definitive solution as only the first reINVITE
is kept in this patch. A better approch is to cancel the first
reINVITE but not sure on design implications.

Issue: #79075
Change-Id: Ice0cbc5dc9f3cc322996d86e65cf6bb1754eadba