Add Android Support
Add a JavaFX backend.
According to https://github.com/makingthematrix/scala_android_dummyapp, this might allow minart apps to run on Android.
Updated walk-through: https://github.com/makingthematrix/scalaonandroid/wiki
JavaFX seems to not be a good fit for Minart, However, Scala 2.13.7 improves the Android support.
Maybe it's worth to take a look at this once #137 is merged.
Updating this issue to "Add android support", as it makes more sense (I don't really care if Minart uses JavaFX or anything else, as long as it runs on Android)
This might also be an interesting option: https://wiki.libsdl.org/SDL2/README/android