How to fix Android back button cold start bug in Flutter (flutter/flutter#117061)

Issue

Flutter example project showcasing our fix for the flutter issue flutter/flutter#117061

Article

Full article on the topic: https://solvro.pwr.edu.pl/blog/fix-flutter-android-back-btn

Branches

• master - branch with the minimal reproducible workaround for the issue
• buggy - branch showcasing the problem, without the fix

Original PR fix in ToPWR app

Solvro/mobile-topwr#80