Immediately set the _sessionEnded flag upon exitXRAsync call (#8681)
Immediately set the _sessionEnded flag upon exitXRAsync call (#8681)


Kesshi/Babylon.js,sebavan/Babylon.js,Kesshi/Babylon.js,RaananW/Babylon.js,BabylonJS/Babylon.js,sebavan/Babylon.js,RaananW/Babylon.js,NicolasBuecher/Babylon.js,NicolasBuecher/Babylon.js,NicolasBuecher/Babylon.js,BabylonJS/Babylon.js,sebavan/Babylon.js,Kesshi/Babylon.js,BabylonJS/Babylon.js,RaananW/Babylon.js