[Java] Make sure Netty Allocator has correct behavior with empty ArrowBuf

Include a test which ensures that the Netty Allocator returns an empty-behaving byte buffer when users allocate a zero byte buffer

**Reporter**: [Ji Liu](https://issues.apache.org/jira/browse/ARROW-8870) / @tianchen92

_{**Note**: *This issue was originally created as [ARROW-8870](https://issues.apache.org/jira/browse/ARROW-8870). Please see the [migration documentation](https://github.com/apache/arrow/issues/14542) for further details.*}

先定位 Netty allocator，以及它對零位元組 ArrowBuf 配置的處理方式。新增要求的配置零位元組緩衝區的回歸測試，並確認傳回的位元組緩衝區會以空的狀態運作。該 issue 未指明來源檔案或測試檔案，因此首先需要搜尋 repository。

由索引模型根據 Issue 內容生成。