fix style checks

Author: BryanCutler

sql/core/src/main/scala/org/apache/spark/sql/execution/arrow/ArrowConverters.scala

@@ -21,6 +21,7 @@ import java.io.ByteArrayOutputStream
 import java.nio.channels.Channels
 
 import scala.collection.JavaConverters._
+
 import io.netty.buffer.ArrowBuf
 import org.apache.arrow.memory.{BufferAllocator, RootAllocator}
 import org.apache.arrow.vector._
@@ -30,6 +31,7 @@ import org.apache.arrow.vector.schema.{ArrowFieldNode, ArrowRecordBatch}
 import org.apache.arrow.vector.types.{DateUnit, FloatingPointPrecision}
 import org.apache.arrow.vector.types.pojo.{ArrowType, Field, FieldType, Schema}
 import org.apache.arrow.vector.util.ByteArrayReadableSeekableByteChannel
+
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.types._
 import org.apache.spark.util.Utils