toParquetMetadata method in ParquetMetadataConverter does not set dictionary page offset bit

toParquetMetadata method converts org.apache.parquet.hadoop.metadata.ParquetMetadata to org.apache.parquet.format.FileMetaData but this does not set the dictionary page offset bit in FileMetaData.

When a FileMetaData object is serialized while writing to the footer and then deserialized, the dictionary offset is lost as the dictionary page offset bit was never set.

PARQUET-1850  tried to fix this but it did only a partial fix.

It sets setDictionary_page_offset only if getEncodingStats are present
```java

if (columnMetaData.getEncodingStats() != null
&& columnMetaData.getEncodingStats().hasDictionaryPages())
{ metaData.setDictionary_page_offset(columnMetaData.getDictionaryPageOffset()); }
```
However, it should setDictionary_page_offset even when getEncodingStats are not present but encodings are present.

It should use the implementation in ColumnChunkMetatdata below:
```java

public boolean hasDictionaryPage() {
EncodingStats stats = getEncodingStats();
if (stats != null) {
return stats.hasDictionaryPages() && stats.hasDictionaryEncodedPages();
}

Set encodings = getEncodings();
return (encodings.contains(PLAIN_DICTIONARY) || encodings.contains(RLE_DICTIONARY));
}
```
So new change in ParquetMetadataCOnvertor should be like:

 
```java

if (columnMetaData.hasDictionaryPage()) { metaData.setDictionary_page_offset(columnMetaData.getDictionaryPageOffset()); }
```

**Reporter**: [Abhishek Dixit](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=abhishekd0907)
#### PRs and other links:
- [GitHub Pull Request #1340](https://github.com/apache/parquet-mr/pull/1340)

_{**Note**: *This issue was originally created as [PARQUET-2464](https://issues.apache.org/jira/browse/PARQUET-2464). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*}

Bắt đầu trong ParquetMetadataConverter.toParquetMetadata và so sánh điều kiện về dictionary page của nó với ColumnChunkMetadata.hasDictionaryPage(), như được mô tả trong issue. Xác minh rằng việc tuần tự hóa và giải tuần tự footer vẫn giữ nguyên dictionary page offset khi encoding stats không có nhưng dictionary encodings có; kiểm tra Pull Request #1340 để xem công việc hiện có.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.