Bug#1099632: Treat AARs as zips

[Matt Corallo]

Package: diffoscope
Version: 240+deb12u1

AAR files are identified by file as "Android package (APK), with AndroidManifest.xml", but really 
they're just zips with specific files inside. It would be nice to be able to use diffoscope's diff 
view given that, but currently we just drop to a binary diff.

Tried to file this on salsa which the website suggests, but sadly, "Your request to join 
https://salsa.debian.org/ has been rejected."