Add support for APK Expansion Files aka OBB

Google play has a limit of 50MB for APK files. They provide a mechanism to put data in expansion files to break this limit. Adding similar support would allow distribution via f-droid.

Are these data files usually generated somehow? How would we discriminate what are binaries and what aren't?

Added requires-fdroidserver-changes label

mentioned in merge request !96 (closed)

CC'ing @eighthave who was working on support for .obb files in the fdroidserver metadata. I couldn't seem to find any relevant issues when searching for "obb" in the fdroidserver issue tracker, wondering if you could provide a relevant link here?

The server side is already integrated: https://gitlab.com/fdroid/fdroidserver/merge_requests/143

A merge request for basic support in the client is coming this week, you can see WIP commits in my repo.

Reassigned to @eighthave

Milestone changed to %0.102

Changed title: Add support for APK Expansion Files → Add support for APK Expansion Files aka OBB

Added ~16415 label

!383 (merged) was merged a while ago, and implements this. Please test!

Status changed to closed