Rejecting permissions can stop the app from working on Android 12

[friissoren]

Google seems to have changed something on Android 12. If the user doesn't grant permissions when they are being requested, the toast messages that give feedback to the user are not visible. Even the recent changes to use a snackbar instead doesn't seem to help with this problem.

And worse, if the user continue to reject permissions, at some point the app won't even ask anymore and can't even be started to make another request.

[friissoren]

At least partly fixed by 92c5471.