Unable to start service Intent: not found

I am following the Android Notifications documentation. I am using the code as shown in the Full Example at the bottom of the page.

But in LogCat I get the message:

Unable to start service Intent { cmp=com.abc.def/.ExampleServiceService (has extras) } U=0: not found.

Does this mean the ExampleService.js file is located incorrectly within my Alloy project directory? I have tried putting the file in /lib, /app/assets/android, /controllers, and various others locations.

Thanks.