refactor(demo): change DemoView location

Author: mlopezFC

…owingcode/addons/applayout/DemoView.java …de/vaadin/addons/applayout/DemoView.javasrc/test/java/com/flowingcode/addons/applayout/DemoView.java renamed to src/test/java/com/flowingcode/vaadin/addons/applayout/DemoView.java src/test/java/com/flowingcode/addons/applayout/DemoView.java renamed to src/test/java/com/flowingcode/vaadin/addons/applayout/DemoView.java

@@ -17,7 +17,7 @@
  * limitations under the License.
  * #L%
  */
-package com.flowingcode.addons.applayout;
+package com.flowingcode.vaadin.addons.applayout;
 
 import com.vaadin.flow.component.orderedlayout.VerticalLayout;
 import com.vaadin.flow.router.BeforeEnterEvent;