[Java] Implement non-sparse tensors

We'd like to be able to round-trip NumPy ndarrays through Java, and create tensors in Java that can be eventually mapped to ndarrays in Python. Having even a basic Tensor implementation, with extension types, as a contrib module would help greatly.

Some prior discussions
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**Reporter**: [David Li](https://issues.apache.org/jira/browse/ARROW-10101) / @lidavidm
#### PRs and other links:
- [GitHub Pull Request apache/arrow#8278](https://github.com/apache/arrow/pull/8278)

_{**Note**: *This issue was originally created as [ARROW-10101](https://issues.apache.org/jira/browse/ARROW-10101). Please see the [migration documentation](https://github.com/apache/arrow/issues/14542) for further details.*}

先閱讀連結的先前討論和 Apache Arrow pull request #8278；該 issue 沒有指定 Java 檔案、測試或進入點。完成的標準是支援能夠與 NumPy ndarray 往返轉換的非稀疏張量，並且能夠在 Java 中建立這些張量，以便之後映射到 Python ndarray。

由索引模型根據 Issue 內容生成。