refactor(bigquery): eliminate FQCNs in ArrowSerializationOptionsConverter and BigQueryImpl

Author: jinseopkim0

java-bigquery/google-cloud-bigquery/src/main/java/com/google/cloud/bigquery/BigQueryImpl.java

@@ -45,7 +45,6 @@
 import com.google.cloud.bigquery.InsertAllRequest.RowToInsert;
 import com.google.cloud.bigquery.spi.v2.BigQueryRpc;
 import com.google.cloud.bigquery.spi.v2.HttpBigQueryRpc;
-import com.google.cloud.bigquery.storage.v1.ArrowRecordBatch;
 import com.google.cloud.bigquery.storage.v1.BigQueryReadClient;
 import com.google.cloud.bigquery.storage.v1.BigQueryReadSettings;
 import com.google.cloud.bigquery.storage.v1.ReadRowsRequest;
@@ -357,7 +356,8 @@ public Page<FieldValueList> getNextPage() {
             while (rowBatch.size() < pageSize && streamIterator.hasNext()) {
               ReadRowsResponse response = streamIterator.next();
               if (response.hasArrowRecordBatch()) {
-                ArrowRecordBatch batch = response.getArrowRecordBatch();
+                com.google.cloud.bigquery.storage.v1.ArrowRecordBatch batch =
+                    response.getArrowRecordBatch();
                 ArrowRecordBatch deserializedBatch =
                     MessageSerializer.deserializeRecordBatch(
                         new ReadChannel(