[Java] Transfer validity buffer data word at a time (currently we do byte at a time)

We should split and transfer validity buffer contents word at a time.

**Reporter**: [Siddharth Teotia](https://issues.apache.org/jira/browse/ARROW-1876) / @siddharthteotia

_{**Note**: *This issue was originally created as [ARROW-1876](https://issues.apache.org/jira/browse/ARROW-1876). Please see the [migration documentation](https://github.com/apache/arrow/issues/14542) for further details.*}

该 issue 要求 Java 实现按 word 而不是按 byte 对 validity-buffer 内容进行拆分和传输。首先找到 validity-buffer 传输的实现及其现有测试，然后验证在使用 word 大小的操作时传输行为仍然正确。

由索引模型根据 Issue 内容生成。