Summary: When we built packager asset system we were mostly concerned about images. However, this system can also be used to work with videos, animations and other binary resources. The code that sorts assets into Android resource folders currently just shoves all non-drawable resources under `drawable-mdpi`, which is not ideal. Talking to Android experts on the team, `raw` seems like a much better place for other resources.
Reviewed By: jeanlauliac
Differential Revision: D6026633
fbshipit-source-id: cc2199f60da411ea432972a02f52c459ff5c490a
