[CI][Java] Sporadic failure in {{testDirectReservationListener}}

I am seeing the following failure on a JNI build on an unrelated PR:
```Java

Error: Failures:
Error: TestReservationListener.testDirectReservationListener:58 expected:<8194> but was:<8193>
```

**Reporter**: [Antoine Pitrou](https://issues.apache.org/jira/browse/ARROW-17707) / @pitrou

_{**Note**: *This issue was originally created as [ARROW-17707](https://issues.apache.org/jira/browse/ARROW-17707). Please see the [migration documentation](https://github.com/apache/arrow/issues/14542) for further details.*}

从第 58 行的 TestReservationListener.testDirectReservationListener 开始，并在 JNI 构建中复现报告的失败。比较预期值 8194 与观测值 8193，并跟踪测试的 reservation listener 行为，直到解释清楚这一偶发结果；完成的标准是测试不再无故失败。

由索引模型根据 Issue 内容生成。