How should I respond to the BACK button on the GearVR?

I have noticed in the apps in the Oculus Home that when you hit the GearVR’s back button it gives a popup to confirm returning to the Oculus Home.

Now I have not figured out what corporate hoops to jump through to get my app to appear inside Oculus Home, but I would like for my app to respond to the back button in such a way that it behaves similarly if I ever do get it into the Oculus Home library.

What API calls are appropriate?

If (Input.GetKeyDown(KeyCode.Escape)) {
    // do something smarter

This will move the app to the background like most apps behave.

AndroidJavaObject activity = new AndroidJavaClass("com.unity3d.player.UnityPlayer").GetStatic<AndroidJavaObject>("currentActivity");
						activity.Call<bool>("moveTaskToBack" , true);