Ship native libraries for Android

I'm working on a native C++ Android app, where I want to use Filament from C++. I understand there's a Gradle library which ships a `.aar` file, but this does not work for me because:
1. There are no headers included in the `filament-android` library
2. I have to manually extract the `.so` files from the `.aar` file using a Gradle script (which is just a bit annoying)

It would be great to have prefab support for the Android library so that both headers are included in the lib, and the lib could be used directly without manual .aar extraction.