Add source-built versions to F-Droid

[niccokunzmann]

The source-built versions are described here: https://forum.f-droid.org/t/source-built-versions-of-jar-files/8934/2 Since Androidsoft-Libraries were changed, the new sources should be added to F-Droid. See:

• https://f-droid.org/docs/Build_Metadata_Reference/#Builds
• https://gitlab.com/fdroid/fdroiddata/-/blob/master/metadata/org.androidsoft.coloring.yml
• https://gitlab.com/fdroid/fdroiddata/-/blob/master/srclibs/androidsoft-lib-utils.txt
• https://gitlab.com/fdroid/fdroiddata/-/blob/master/srclibs/androidsoft-lib-credits.txt

Libraries:

• [ ] https://github.com/rjmarsan/Weka-for-Android
• [ ] https://github.com/niccokunzmann/coloringbook-lib-utils
• [ ] https://github.com/androidsoft-org/androidsoft-lib-credits/