Change volume of device whilst android app is running in Cardboard VR mode

Using GoogleVR 1.50.0, whenever the app is switched into Cardboard mode the volume controls are disabled due to the android volume bar not showing in Stereo. I get that reasoning, but is there any way to override the disabled volume controls and allow the buttons to change the volume without showing the android volume bar or showing a custom volume bar within Unity?

Nevermind, this appears to be a bug within Unity which was fixed in versions 5.6.3f1 and 2017.1.1f1.

Found this closed thread on GoogleVR’s github which cleared that up.