Sideload APK for the closed Play window (pqp.gg/android).
Built by .github/workflows/android.yml from the sideload
variant: production API, R8, debug-signed. Not the Play upload
key, so the listing cannot update over this install. Uninstall
this build when the store opens.
Filename is stable (pqp.apk) so the download URL does not
change when the binary does.