In our beta tests using Gear VR, the back button and volume buttons work as requested. But when submitted to review, the "reserved interactions test" fails with the following message:
A back button long-press (greater than 0.75 seconds) must bring the user to the Universal Menu.
A “back” action is interpreted by the application dependent on its current state, but generally it will retreat one level in an interface hierarchy. The short-press should provide a custom confirmation dialog which allows the user to exit the app and return to Oculus Home.
Your volume buttons must adjust the volume using the VR volume UI provided by the Oculus Mobile SDK. Currently, your volume display does not function as expected.
Our application does not have any specific handlers for the back action or the volume button actions, other than the defaults described above.
How can we proceed?