Changes in android library does not reflect

When a made change in the layout or the code of the example app in Git-hub in Android studio the change does not reflect in the emulator app or in the compiled APK.

Ping @ido

I need more details to address your issue.
Did you clone the project locally, tried updating some resource XMLs then sync/rebuild?
What did you change and was not reflected? What version of Android Studio are you using?
Please provide as much detail as you can

I clone the example app branch locally and make changes in the values xml file, i tried to clear project, rebuild project and grade sync, but the changes does not reflect in the final application. the only changes that reflect are the ones that are made in the android app but not the one in the devicesetup.