Reorder Imports (Fixing Code Formatting Violation)

Author: tkaymak

runners/spark/src/main/java/org/apache/beam/runners/spark/translation/streaming/ParDoStateUpdateFn.java

@@ -19,6 +19,7 @@
 
 import java.io.Serializable;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
@@ -62,7 +63,6 @@
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import java.util.Collections;
 import scala.Option;
 import scala.Tuple2;
 import scala.runtime.AbstractFunction3;