message: sample-gltf-viewer: keep screen turned on
diff: @@ -60,6 +60,7 @@ class MainActivity : Activity() {
  override fun onCreate(savedInstanceState: Bundle?) {
  super.onCreate(savedInstanceState)
  setContentView(R.layout.simple_layout)
  + window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
  titlebarHint = findViewById(R.id.user_hint)
  surfaceView = findViewById(R.id.main_sv)
  