Fix demo apps on Xiaomi redmi 8 (Android 9)

[sergeivolodin]

• Compatibility warning at the start of the chest demo
• EGL/GL/HWB status codes OK
• QImage from the backend is fine (VideoFrame2Image)
• Shader outputs black image always

[sergeivolodin]

• If fragment = vec4(0.1, 0.2, 0.3, 1.0);, still black
• If HardwareBuffer code removed, still black

disabling hwb...