Add support for linking images on Android

[MiloszFilimowski]

Hey 👋 Thanks for creating this awesome package :)

I store my images on the native side to help with performance. Right now this package works great for iOS, unfortunately Android requires all images to be stores in drawable folder (correct me if I'm wrong) and won't load the asset inside <Image/> tag.

Would it be hard to support it?

[unimonkiez]

Pretty easy to implement, just add the extensions here, I'll merge and publish that pull request when you're done