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Users will be able to manually revoke that permission on Android 14 (already available in the current beta under Apps -> Special app access -> Full screen notifications);
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Google Play will auto-revoke those permissions from newly installed apps unless they provide call or alarm functionality;
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This permission will remain for apps that were installed before the Android 14 update.
(source: Mishaal Rahman on X)
Some apps already display ads as notifications I think? Wonโt be crazy to imagine that there might be apps whoโd do that using this fullscreen intent to show you a fullscreen ad even when your phone is locked, as if you had received a call. But again Iโm probably outdated on this and just speculating, havenโt had a single app displaying ads since a very long time.