Generally, it seems that the success and failure of a language depends on libraries, and most android libraries are written around Java rather than native. But

Generally, it seems that the success and failure of a language depends on libraries, and most android libraries are written around Java rather than native. But if you want, you can write libraries which will allow you to write Android Apps in C, C++, C#, Rust or Go (as people have already done, see Qt and Xamarin for example). The thing is that it's much easier to write a simple CRUD app in Java than in C++.