Did it ever tested and on which devices?
Editor note says “Only available on some GearVR Android devices using OpenGL ES 3.1”
I have an S7, which is the only and one top-notch GearVR Android ES 3.1 device at the moment and multiview must be tested on it.
My current working ES 3.1 project for S7 (Exynos) runs clearly black screen from the start after turning mult-iview option on, maybe depends of Exynos/Snapdragon SoC or MobileHDR settings, who knows.
Any thoughts?