[Java][FlightRPC] Update benchmark to be on par with C++

See https://github.com/apache/arrow/issues/13980

The Java benchmark isn't comparable out of the box (and it seems like there's an unexplained gap between it and the C++ benchmark)

**Reporter**: [David Li](https://issues.apache.org/jira/browse/ARROW-17537) / @lidavidm

_{**Note**: *This issue was originally created as [ARROW-17537](https://issues.apache.org/jira/browse/ARROW-17537). Please see the [migration documentation](https://github.com/apache/arrow/issues/14542) for further details.*}

首先阅读链接的 Apache Arrow issue 13980，并将 Java FlightRPC 基准测试与其 C++ 对应版本进行比较。找出这些基准测试无法比较的原因，以及造成所报告性能差距的原因。完成标准是 Java 基准测试与 C++ 基准测试保持一致，并产生可比较的结果。

由索引模型根据 Issue 内容生成。