Build Android artifacts with a reusable workflow

[webknjaz]

This is a follow up for #265 that added initial implementation with
copy-pasted steps.

[webknjaz]

@mhsmith here's the interface I envision. The references would need to be updated, of course. But it does still rely on the same API surface of android.py (CLI).

[webknjaz]

Example in-fork GHA run: https://github.com/webknjaz/python--release-tools/actions/runs/16969209454

[webknjaz]

cc @freakboy3742

[mhsmith]

Thanks; I'm on holiday for the next few days, but I'll look at this when I get back.

[hugovk]

Please could you resolve the conflict to point to upstream 3.14.0rc2? (As in main.)

[webknjaz]

@hugovk is that necessary at this point, while in review? The branch has a few temporary things that should not be merged anyway.

[hugovk]

Yes please, it's better if we can review it in the mergeable state, without the temporary things/FIXMEs.

[mhsmith]

I'm not sure this is an improvement. See python/cpython#137768 (comment).

[webknjaz]

Yes please, it's better if we can review it in the mergeable state, without the temporary things/FIXMEs.

The thing is that it's not really possible to point to a merge commit that doesn't exist before the PR is merged. So I don't see this happening at this stage. That's effectively why I created this PR as a draft.

But that doesn't matter anymore since it looks I'll have to abandon the cross-repo reusability bit for now.