Follow-up from "Change the way we display the permission granting in the onboarding"

The following discussion from !1399 (merged) should be addressed:

• @Skantes started a discussion: (+3 comments)

  Is it really necessary to spawn the "VLC cannot access all of your files" snackbar every time the activity is created, forcing the user to go to the dialog a check "do not show again" ? Maybe add a timer, so that after a few dismissals it doesn't show up again ? This will aggravate some users