feat(oss-licenses): implement dynamic embedded license detection

[timothyfroehlich]

Summary

This PR refactors the oss-licenses-plugin to dynamically detect and extract embedded licenses from all AAR and JAR artifacts, removing the hardcoded reliance on specific Google Play Services or Firebase maven groups.

Key changes

• Dynamic Detection: Replaced the hardcoded isGoogleServices and isGranularVersion checks with a universal "bundled license" check. The task now attempts to unzip every resolved artifact to look for third_party_licenses.json and third_party_licenses.txt.
• Side-car Support: Implemented a generic suffix check (*-license) to skip POM license extraction for side-car artifacts while still extracting their embedded data, preventing redundant attribution entries.
• Robust Extraction: Updated addEmbeddedLicenses to use try-with-resources for ZipFile handling and added error catching for malformed or non-ZIP artifacts to ensure build stability.
• Code Cleanup: Removed obsolete constants (GOOGLE_PLAY_SERVICES_GROUP, FIREBASE_GROUP, etc.) and internal methods related to legacy group-based branching.

Test plan

• Added action_nonGmsGranularLibrary_extractsTransitiveLicenses unit test for non-GMS granular licenses.
• Added action_licenseSidecarArtifact_skipsPomButExtractsEmbedded unit test for the -license side-car path.
• Verified full unit test suite (21/21 passed).
• Verified full integration test matrix (30/30 passed) across AGP 7.4 through 9.0-alpha.