plugin XEP-0167, XEP-0353: handle ringing: - add a `jingle_preflight_info` method in the Jingle Application model to handle this kind of information - XEP-0353 is calling `jingle_preflight_info` when a `ringing` message is received - XEP-0167 use this information to send a `ringing` info to frontends

#!/bin/sh

eval $(dbus-launch --sh-syntax)

nohup /usr/bin/Xtigervnc -geometry 1024x768 -desktop "Libervia e2e test" -rfbport 5900 -SecurityTypes None :0 &
nohup openbox &
exec libervia-backend fg