Added a demo scene of stereo photo mode.

Author: ruofeidu

Assets/ARRealismDemos/Common/Configurations/ARRealismDepthSessionConfig.asset

@@ -20,3 +20,4 @@ MonoBehaviour:
   CameraFocusMode: 1
   AugmentedFaceMode: 0
   DepthMode: 1
+  InstantPlacementMode: 0

Assets/ARRealismDemos/DemoCarousel/Materials/StereoPhotoSceneButton.mat

@@ -0,0 +1,81 @@
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