ci: run artifact uploads on Node 24

[zhi1ong]

Summary

• Pin actions/upload-artifact to the official v7.0.1 commit, which declares Node 24, replacing the Node 20 action used by the device report upload step.
• Preserve the existing test matrix, permissions, artifact names, upload paths and 14-day retention.
• Keep default ZIP archiving, hidden-file exclusion and non-overwriting uploads. No Android runtime, API, dependency baseline or release configuration changes.

Validation

• actionlint .github/workflows/build.yml passed.
• git diff --check passed.
• Compared the old and new action manifests: existing input defaults/requirements and outputs are compatible; ZIP archiving remains enabled by default.
• Compared the full workflow structure and checked all six artifact names for uniqueness; only the pinned action reference changes.
• Remote validation is pending: run the existing CI matrix and verify the six uploaded device artifacts, JUnit reports and Release/R8 mappings before merge. The earlier develop run used the old action and is not evidence for this upload change.

Target: develop. Publication remains out of scope.