Add blank line between java and javax imports

See gh-23539

spring-context/src/test/java/example/scannable/AutowiredQualifierFooService.java

@@ -17,6 +17,7 @@
 package example.scannable;
 
 import java.util.concurrent.Future;
+
 import javax.annotation.PostConstruct;
 
 import org.springframework.beans.factory.annotation.Autowired;

spring-context/src/test/java/example/scannable/FooServiceImpl.java

@@ -19,6 +19,7 @@ package example.scannable;
 import java.util.Comparator;
 import java.util.List;
 import java.util.concurrent.Future;
+
 import javax.annotation.PostConstruct;
 
 import org.springframework.beans.factory.BeanFactory;