Overview

This PR builds on top of the native Flatpak cache scanner (#5533) by introducing standard Maven filename reconstruction to prevent 404 download errors on non-standard cached files (such as animation.aar).

🛠️ Detailed Changes

Standard Maven Filename Reconstruction

• Problem: When walking the local Gradle cache (~/.gradle/caches/modules-2/files-2.1), we occasionally encounter artifacts cached with a simplified filename that doesn't include the standard maven artifact coordinate metadata (for example, animation.aar instead of animation-android-1.10.0.aar). In the Flathub sandbox build environment, attempting to download directly using the non-standard filename results in a 404 error from public repositories (such as Google Maven or Maven Central) because the remote servers only recognize the fully qualified coordinate-based filename.
• Solution: Implemented reconstruction logic in GenerateFlatpakSourcesTask:
  • Verifies whether the cached filename starts with the standard Maven $name-$version pattern.
  • If not, it automatically reconstructs the filename to match standard repository naming conventions ($name-$version.$ext).
  • Uses the reconstructed standard filename (serverFilename) for both the remote URL path construction and the final dest-filename mapping.

🧪 Verification & Results

Spotless & Detekt Compliance

All project formatting and static analysis checks pass cleanly without a single lint regression:

./gradlew spotlessCheck detekt

Result: BUILD SUCCESSFUL (100% clean passes).