fix desig time lockout of on click (#603)

Author: jafu888

constraintlayout/constraintlayout/src/main/java/androidx/constraintlayout/motion/widget/MotionScene.java

@@ -1271,7 +1271,7 @@ private void load(Context context, int resourceId) {
                                 break;
                             case ONCLICK_TAG:
                                 if (transition != null) {
-                                    if (mMotionLayout.isInEditMode()) {
+                                    if (!mMotionLayout.isInEditMode()) {
                                         transition.addOnClick(context, parser);
                                     }
                                 }

desktop/ValidationTool/src/main/java/androidx/constraintlayout/validation/DeviceConnection.java

@@ -82,6 +82,7 @@ public DeviceConnection() {
             reader = new Reader(socket.getInputStream());
             writer = new Writer(socket.getOutputStream());
         } catch (IOException e) {
+            System.err.println("Did you \"adb forward tcp:4242 tcp:4242\"");
             e.printStackTrace();
         }
     }