Describe the bug:

See e.g https://github.com/servo/servo/actions/runs/19526098256/job/55899187824
The upload steps "succeed", but print the warning

Warning: No files were found with the provided path: target/android/aarch64-linux-android/release/servoapp.apk. No artifacts will be uploaded.

The following jobs, which need to download the artifact then fail, because they were not uploaded in the first place.