Move CompositeState to different package

server/src/main/java/com/vaadin/ui/Composite.java

@@ -23,8 +23,8 @@ import java.util.Optional;
 
 import com.vaadin.server.ErrorMessage;
 import com.vaadin.server.Resource;
-import com.vaadin.shared.composite.CompositeState;
 import com.vaadin.shared.ui.ContentMode;
+import com.vaadin.shared.ui.composite.CompositeState;
 
 /**
  * Composite allows creating new UI components by composition of existing

shared/src/main/java/com/vaadin/shared/composite/CompositeState.java → shared/src/main/java/com/vaadin/shared/ui/composite/CompositeState.java

@@ -13,7 +13,7 @@
  * License for the specific language governing permissions and limitations under
  * the License.
  */
-package com.vaadin.shared.composite;
+package com.vaadin.shared.ui.composite;
 
 import com.vaadin.shared.AbstractComponentState;