[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.*}

Comece localizando o Java Flight IntegrationTestClient e revisando a issue relacionada ao teste de integração de null type. Determine quais casos de roundtrip os testes integrados devem cobrir e como os testes de integração existentes são executados. O trabalho estará concluído quando o Java Flight Test Client tiver a cobertura de roundtrip solicitada.

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