main/waydroid-image: new aport

This used to be in Alpine but they don't want what is basically a giant unknown blob, and for good reasons. However we do want to provide these images for ease of install and quality-control, so let's ship it in pmOS instead.

Maybe at some point we can build such Android images straight from source in an APKBUILD, but seeing the insane build system requirements that requires, probably not lol.