<Feature> Recall via notifications

[Ironriot]

It would be amazing if we can get the "recalls" (maybe in flashcard form) in the notification bar (of android devices), with the the "recalls" being repeated according to algorithms of space repetition.

Hence we will be able to review things without having to open the app.

For example :- Take a look at what this app does
https://play.google.com/store/apps/details?id=com.g2.quizification.pro&hl=en_IN&gl=US