UI notification different when kill app

[vohoangtuit]

i custom view notification by file xml, it only show when app opening. when close app, notification show from payload and it different with view my costom, i want to show view by xml when close app, thanks

[samtstern]

@vohoangtuit without any code, screenshots, etc it's hard to know where to begin. I would suggest looking at some of the other FCM related issues like #4 or #89