In the happy wild times of custom ROMs frenzy on Android (around versions 2.6-4), there was plenty of such attempts. Many devs included them directly in ROM by

In the happy wild times of custom ROMs frenzy on Android (around versions 2.6-4), there was plenty of such attempts. Many devs included them directly in ROM by default. Unfortunately, all I saw were rather dirty hacks that only kinda worked.