Add intentionally vulnerable M1 mobile app

[Krlier]

Following OWASP's mobile top 10 list, it would be awesome if we had an intentionally vulnerable M1 - Improper Platform Usage app.

This app can be done in both iOS or Android environment, just be sure to add how one can deploy it and test it locally.

Just like the web applications, we also expect an attack narrative to demonstrate why this vulnerability is critical and should be fixed ASAP by its development team.