crashed app on the iOs 16.2

[alexzh16]

iOs 16.2, after update iOs, the App crashed on background mode. The call incoming without CallKit display Screen and crashed. If app is open, that working greet.

Implementation has on main.dart only one method:

void initState() {
super.initState();
_callKeep.on(CallKeepDidDisplayIncomingCall(), didDisplayIncomingCall);
}