Add ARCameraOptions with light estimation enabled to the SampleUXScene

Assets/Scenes/UX/SampleUXScene.unity

   - component: {fileID: 282840811}
   - component: {fileID: 282840815}
   - component: {fileID: 282840812}
+  - component: {fileID: 282840816}
   m_Layer: 0
   m_Name: AR Camera
   m_TagString: MainCamera
   m_TrackingType: 0
   m_UpdateType: 0
   m_UseRelativeTransform: 1
+--- !u!114 &282840816
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 282840810}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: d82be673b768eb448ade8552ecbc1662, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  m_FocusMode: 1
+  m_LightEstimation: 1
 --- !u!1 &427002218
 GameObject:
   m_ObjectHideFlags: 0