Vectorized API to support Column Index in Apache Spark

As per the comment on https://issues.apache.org/jira/browse/SPARK-26345. Its seems like Apache Spark doesn't support Column Index until we disable vectorizedReader in Spark - which will have other performance implications. As per  @zivanfi  , parquet-mr should implement a Vectorized API. Is it already implemented or any pull request for the same?

**Reporter**: [Felix Kizhakkel Jose](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=FelixKJose) / @FelixKJose

_{**Note**: *This issue was originally created as [PARQUET-1830](https://issues.apache.org/jira/browse/PARQUET-1830). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*}

该 issue 指向 SPARK-26345，并询问 parquet-mr 是否已经具备向量化 API 或相关的 pull request；首先查看链接的讨论，并检查当前的 parquet-java 实现。由于报告询问的是是否存在支持，而不是指定一项具体更改，因此未定义 Done。

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