[Java][Flight][Tests] Add roundtrip tests for Java Flight Test Client

There should be some built-in roundtrip tests for Java Flight IntegrationTestClient

**Reporter**: [Bryan Cutler](https://issues.apache.org/jira/browse/ARROW-7933) / @BryanCutler
#### Related issues:
- [[Integration][Java] null type integration test](https://github.com/apache/arrow/issues/24122) (is related to)

_{**Note**: *This issue was originally created as [ARROW-7933](https://issues.apache.org/jira/browse/ARROW-7933). Please see the [migration documentation](https://github.com/apache/arrow/issues/14542) for further details.*}

先找出 Java Flight IntegrationTestClient，並檢視相關的 null type integration test issue。確定內建測試應涵蓋哪些 roundtrip 案例，以及現有 integration test 的執行方式。完成的標準是 Java Flight Test Client 具備所要求的 roundtrip 涵蓋範圍。

由索引模型根據 Issue 內容生成。