HDRenderPipeline: Update scene test material

Assets/TestScenes/HDTest/GraphicTest/Two Sided/Material/GroundLeaf_DoubleSided.mat

   m_Name: GroundLeaf_DoubleSided
   m_Shader: {fileID: 4800000, guid: c4edd00ff2db5b24391a4fcb1762e459, type: 3}
   m_ShaderKeywords: _ALPHATEST_ON _DEPTHOFFSETENABLE_OFF _DETAIL_MAP_WITH_NORMAL _DISTORTIONDEPTHTEST_OFF
-    _DISTORTIONENABLE_OFF _DISTORTIONONLY_OFF _DOUBLESIDED_LIGHTING_MIRROR _EMISSION
-    _ENABLEPERPIXELDISPLACEMENT_OFF _MASKMAP _METALLICGLOSSMAP _NORMALMAP _NORMALMAP_TANGENT_SPACE
-    _TESSELLATIONOBJECTSCALE_OFF _TESSELLATION_DISPLACEMENT
+    _DISTORTIONENABLE_OFF _DISTORTIONONLY_OFF _DOUBLESIDEDMIRRORENABLE_OFF _DOUBLESIDED_LIGHTING_MIRROR
+    _DOUBLESIDED_ON _EMISSION _ENABLEPERPIXELDISPLACEMENT_OFF _MASKMAP _METALLICGLOSSMAP
+    _NORMALMAP _NORMALMAP_TANGENT_SPACE _TESSELLATIONOBJECTSCALE_OFF _TESSELLATION_DISPLACEMENT
-  m_CustomRenderQueue: 2450
-  stringTagMap:
-    RenderType: TransparentCutout
+  m_CustomRenderQueue: -1
+  stringTagMap: {}
   disabledShaderPasses:
   - DistortionVectors
   m_SavedProperties:
     - _DistortionEnable: 0
     - _DistortionOnly: 0
     - _DoubleSidedEnable: 1
+    - _DoubleSidedMirrorEnable: 0
     - _DoubleSidedMode: 3
     - _DstBlend: 0
     - _EmissiveColorMode: 1
     m_Colors:
     - _BaseColor: {r: 1, g: 1, b: 1, a: 1}
     - _Color: {r: 0.5882353, g: 0.5882353, b: 0.5882353, a: 1}
+    - _DoubleSidedConstants: {r: -1, g: -1, b: -1, a: 0}
     - _EmissionColor: {r: 0, g: 0, b: 0, a: 1}
     - _EmissiveColor: {r: 0, g: 0, b: 0, a: 1}
     - _UVDetailsMappingMask: {r: 1, g: 0, b: 0, a: 0}

Assets/TestScenes/HDTest/GraphicTest/Two Sided/Material/GroundLeaf_DoubleSidedFlip.mat

     - _DistortionEnable: 0
     - _DistortionOnly: 0
     - _DoubleSidedEnable: 1
+    - _DoubleSidedMirrorEnable: 1
     - _DoubleSidedMode: 2
     - _DstBlend: 0
     - _EmissiveColorMode: 1
     m_Colors:
     - _BaseColor: {r: 1, g: 1, b: 1, a: 1}
     - _Color: {r: 0.5882353, g: 0.5882353, b: 0.5882353, a: 1}
+    - _DoubleSidedConstants: {r: 1, g: 1, b: -1, a: 0}
     - _EmissionColor: {r: 0, g: 0, b: 0, a: 1}
     - _EmissiveColor: {r: 0, g: 0, b: 0, a: 1}
     - _UVDetailsMappingMask: {r: 1, g: 0, b: 0, a: 0}

Assets/TestScenes/HDTest/LayeredLitTest/Material/Layered_Layer0_Triplanar.mat

     - _BlendUsingHeight2: 0
     - _BlendUsingHeight3: 0
     - _BumpScale: 1
-    - _CullMode: 0
+    - _CullMode: 2
     - _Cutoff: 0.5
     - _DepthOffsetEnable: 0
     - _DetailAOScale0: 1
     - _DistortionDepthTest: 0
     - _DistortionEnable: 0
     - _DistortionOnly: 0
+    - _DoubleSidedEnable: 0
+    - _DoubleSidedMirrorEnable: 1
     - _DoubleSidedMode: 1
     - _DstBlend: 0
     - _EmissiveColorMode: 0
     - _BaseColor2: {r: 1, g: 1, b: 1, a: 1}
     - _BaseColor3: {r: 1, g: 1, b: 1, a: 1}
     - _Color: {r: 1, g: 1, b: 1, a: 1}
+    - _DoubleSidedConstants: {r: 1, g: 1, b: -1, a: 0}
     - _EmissionColor: {r: 0, g: 0, b: 0, a: 1}
     - _EmissiveColor: {r: 0, g: 0, b: 0, a: 1}
     - _UVDetailsMappingMask: {r: 1, g: 0, b: 0, a: 0}

Assets/TestScenes/HDTest/LayeredLitTest/Material/Layered_Layer1_Triplanar.mat

     - _BlendUsingHeight2: 0
     - _BlendUsingHeight3: 0
     - _BumpScale: 1
-    - _CullMode: 0
+    - _CullMode: 2
     - _Cutoff: 0.5
     - _DepthOffsetEnable: 0
     - _DetailAOScale0: 1
     - _DistortionDepthTest: 0
     - _DistortionEnable: 0
     - _DistortionOnly: 0
+    - _DoubleSidedEnable: 0
+    - _DoubleSidedMirrorEnable: 1
     - _DoubleSidedMode: 1
     - _DstBlend: 0
     - _EmissiveColorMode: 0
     - _BaseColor2: {r: 1, g: 1, b: 1, a: 1}
     - _BaseColor3: {r: 1, g: 1, b: 1, a: 1}
     - _Color: {r: 1, g: 1, b: 1, a: 1}
+    - _DoubleSidedConstants: {r: 1, g: 1, b: -1, a: 0}
     - _EmissionColor: {r: 0, g: 0, b: 0, a: 1}
     - _EmissiveColor: {r: 0, g: 0, b: 0, a: 1}
     - _UVDetailsMappingMask: {r: 1, g: 0, b: 0, a: 0}

Assets/TestScenes/HDTest/LayeredLitTest/Material/Layered_Layer2_Triplanar.mat

     - _BlendUsingHeight2: 0
     - _BlendUsingHeight3: 0
     - _BumpScale: 1
-    - _CullMode: 0
+    - _CullMode: 2
     - _Cutoff: 0.5
     - _DepthOffsetEnable: 0
     - _DetailAOScale0: 1
     - _DistortionDepthTest: 0
     - _DistortionEnable: 0
     - _DistortionOnly: 0
+    - _DoubleSidedEnable: 0
+    - _DoubleSidedMirrorEnable: 1
     - _DoubleSidedMode: 1
     - _DstBlend: 0
     - _EmissiveColorMode: 0
     - _BaseColor2: {r: 0.61764705, g: 1, b: 0.74685603, a: 1}
     - _BaseColor3: {r: 1, g: 1, b: 1, a: 1}
     - _Color: {r: 1, g: 1, b: 1, a: 1}
+    - _DoubleSidedConstants: {r: 1, g: 1, b: -1, a: 0}
     - _EmissionColor: {r: 0, g: 0, b: 0, a: 1}
     - _EmissiveColor: {r: 0, g: 0, b: 0, a: 1}
     - _UVDetailsMappingMask: {r: 1, g: 0, b: 0, a: 0}

Assets/TestScenes/HDTest/LayeredLitTest/Material/Layered_Layer3_Triplanar.mat

     - _BlendUsingHeight2: 0
     - _BlendUsingHeight3: 0
     - _BumpScale: 1
-    - _CullMode: 0
+    - _CullMode: 2
     - _Cutoff: 0.5
     - _DepthOffsetEnable: 0
     - _DetailAOScale0: 1
     - _DistortionDepthTest: 0
     - _DistortionEnable: 0
     - _DistortionOnly: 0
+    - _DoubleSidedEnable: 0
+    - _DoubleSidedMirrorEnable: 1
     - _DoubleSidedMode: 1
     - _DstBlend: 0
     - _EmissiveColorMode: 0
     - _BaseColor2: {r: 1, g: 1, b: 1, a: 1}
     - _BaseColor3: {r: 0.6602435, g: 0.63235295, b: 1, a: 1}
     - _Color: {r: 1, g: 1, b: 1, a: 1}
+    - _DoubleSidedConstants: {r: 1, g: 1, b: -1, a: 0}
     - _EmissionColor: {r: 0, g: 0, b: 0, a: 1}
     - _EmissiveColor: {r: 0, g: 0, b: 0, a: 1}
     - _UVDetailsMappingMask: {r: 1, g: 0, b: 0, a: 0}

Assets/TestScenes/HDTest/Material/HDRenderLoopMaterials/unlitTwoSided.mat

   m_Name: unlitTwoSided
   m_Shader: {fileID: 4800000, guid: c4edd00ff2db5b24391a4fcb1762e459, type: 3}
   m_ShaderKeywords: _ALPHACUTOFFENABLE_OFF _DISTORTIONDEPTHTEST_OFF _DISTORTIONONLY_OFF
-    _EMISSION
+    _DOUBLESIDED_ON _EMISSION
+  m_EnableInstancingVariants: 0
+  disabledShaderPasses:
+  - DistortionVectors
   m_SavedProperties:
     serializedVersion: 3
     m_TexEnvs:
         m_Texture: {fileID: 0}
         m_Scale: {x: 1, y: 1}
         m_Offset: {x: 0, y: 0}
+    - _DistortionVectorMap:
+        m_Texture: {fileID: 0}
+        m_Scale: {x: 1, y: 1}
+        m_Offset: {x: 0, y: 0}
     - _EmissionMap:
         m_Texture: {fileID: 0}
         m_Scale: {x: 1, y: 1}
     - _Cutoff: 0.5
     - _DetailNormalMapScale: 1
     - _DistortionDepthTest: 0
+    - _DistortionEnable: 0
+    - _DoubleSidedEnable: 1
     - _DoubleSidedMode: 1
     - _DstBlend: 0
     - _EmissiveIntensity: 0
     - _SrcBlend: 1
     - _SurfaceType: 0
     - _UVSec: 0
+    - _ZTestMode: 8
     - _ZWrite: 1
     m_Colors:
     - _Color: {r: 1, g: 1, b: 1, a: 1}