Android: Please add include header .h files to Android releases

For our Android platform implementation, we use the Android NDK and a C++ wrapper to interface with the Filament libraries. As such, we need the .h files as part of our build process.

If the official Android releases contained those files, it would save us a lot of headache and file copying.

Thank you.

EDIT: I guess what we are really asking for is an official release version that supports Android NDK. That would give us a uniform way to support multiple platforms all from a common C++ code base.