Add Android Databases IO support

`dataframe-jdbc` methods don’t work on Android because Android doesn’t properly support JDBC (`java.sql.*` is incomplete), so calling `DataFrame.readSqlQuery` may crash at runtime (see #1014).

We need to add Android Databases IO support. Ideally, we can keep an API similar to `dataframe-jdbc`, but the implementation should be **Android-native**, not JDBC-based.

Possible implementation direction:

- Use raw SQLite.
- Use Room —can be performed using DAO or Cursor.

Start by reading the existing dataframe-jdbc methods and the DataFrame.readSqlQuery entry point, then review the runtime failure described in #1014. Compare the raw SQLite and Room directions, and define Android-native database support with an API similar to dataframe-jdbc that works without java.sql.*.

Written by the indexing model from the issue text.