There is an issue in v1.1 that did not properly cleans the output folder for Android. The issue has been resolved and our next public update will contain the fix.
Meanwhile I have cleaned your project's output directory so you should not experience this problem. I hope it builds fine now.
Sorry for the inconvenience.
All the best,
Evgeni "Zammy" Petrov
the Telerik team
Share feedback and vote for features on our Feedback Portal.
Want some Kendo UI online training - head over to Pluralsight.