Android: Call Activity.setVrModeEnabled
We would do this in the application (client) process after connecting. We'd mention our own package/class as the component. Not supported on all devices, so would have to check (for
hasSystemFeature("android.software.vr.mode")) and still probably wrap in try, in case something weird happens (user disables us in the vr listener settings but not elsewhere, etc).
I think this should be enough to get low-persistence mode on displays that have it.