[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.*}

從第 58 行的 TestReservationListener.testDirectReservationListener 開始，並在 JNI 建置中重現回報的失敗。比較預期值 8194 與觀察到的值 8193，並追蹤測試的 reservation listener 行為，直到解釋清楚這個偶發結果；完成的標準是測試不再無故失敗。

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