Android Gradle Wrapper

Run Android work from android/ via the Gradle wrapper.

• Prefer (cd android && ./gradlew <task>) or bash scripts/android/gradlew_task.sh <task>.
• The script works from any cwd, passes arguments unchanged to ./gradlew run from android/, and returns Gradle's exit code. Combined stdout and stderr are shown and also saved to scratch/gradlew-<UTC timestamp>-<pid>.log; the log path is printed to stderr before and after the run. Use -h or --help as the first argument for usage.
• Do not run Gradle tasks from the repo root.
• Choose explicit tasks that match the request, such as test, lint, assemble, or a module-scoped task.
• Save long Gradle output under scratch/ when you need to inspect logs that will not be shown directly.
• Treat this as a building-block skill for validate, test, or check-ci, not as the primary workflow when the user asks for a broader task.
• Pair this with local-validation-scripts when a repo script already wraps the Android validation you need.