android-sdk-cmdline-tools : Android SDK Command-line Tools ( https://developer.android.com/studio/command-line )
flutter : Google's SDK for crafting beautiful, fast user experiences for mobile, web, and desktop from a single codebase ( https://flutter.dev )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a zGentoo
For Paludis use this rsync : rsync://gentoo.zugaina.org/zGentoo-portage
If you have a problem : ycarus(-at-)zugaina.org