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.*}

The issue points to SPARK-26345 and asks whether parquet-mr already has a vectorized API or an associated pull request; start by reviewing that linked discussion and checking the current parquet-java implementation. Done is not defined because the report asks whether support exists rather than specifying a concrete change.

Written by the indexing model from the issue text.