* [Asset] Add quick start code for ExportAssets.

* [Asset] Add pom.xml.

* [Asset] Add pom.xml.

* [Asset] Test: Assert bucket was created successfully.

* [Asset] Use shorter bucket name in case bucket name exceeds limit.

* [Asset] Print console output for easier troubleshooting.

* [Asset] Avoid random bucket name to avoid gcs file writing failure.

* [Asset] Fix build issue.

* [Asset] Minor update on comment.

* [Asset] Add quick start code for ExportAssets API

* [Asset] Minor comment fix