"Copyright GPL"
I don't think this meets the bar for copyrightable code. Copyright protects creative expression. Displaying a single dialogue does not take creative expression, and pretty much any developer given the task would produce code identical to this.
Yes, this code is almost as trivial as a hello world.
Have you looked at the code? I sure wouldn’t produce exactly that. Even for identical functionality, its FreeDroidWarn.java methods are 30 lines, I’d write it in 13 lines. I also wouldn’t write exactly the same strings (some stylistic changes, some being specific rather than generic as is somewhat necessary for a library), and definitely couldn’t produce 17 other translations.
This easily meets thresholds for creative work. The basic concept is nigh-trivial, but the concrete implementation is still creative.
and pretty much any developer given the task would produce code identical to this.
That I doubt; it seems more like it's deliberately large and complex enough to be copyrightable, because otherwise it wouldn't be.
Don't complain about the license. The license removes any doubt. You can happily use it without having to worry. If there was no license you'd have uncertainty.
Also you're misquoting. The license is GPL-3, not AGPL.