Adds toggles for samples if no XR system found

Signed-off-by: amzn-phist <[email protected]>

Gem/Code/Source/SampleComponentManager.cpp

@@ -307,7 +307,7 @@ namespace AtomSampleViewer
             NewRHISample<TextureMapExampleComponent>("TextureMap"),
             NewRHISample<TriangleExampleComponent>("Triangle"),
             NewRHISample<TrianglesConstantBufferExampleComponent>("TrianglesConstantBuffer"),
-            NewRHISample<XRExampleComponent>("OpenXr"),
+            NewRHISample<XRExampleComponent>("OpenXr", []() { return AZ::RHI::RHISystemInterface::Get()->GetXRSystem() != nullptr; }),
             NewRHISample<MatrixAlignmentTestExampleComponent>("MatrixAlignmentTest"),
             NewRPISample<AssetLoadTestComponent>("AssetLoadTest"),
             NewRPISample<AuxGeomExampleComponent>("AuxGeom"),
@@ -342,7 +342,7 @@ namespace AtomSampleViewer
             NewFeaturesSample<SkinnedMeshExampleComponent>("SkinnedMesh"),
             NewFeaturesSample<SsaoExampleComponent>("SSAO"),
             NewFeaturesSample<SSRExampleComponent>("SSR"),
-            NewFeaturesSample<XRRPIExampleComponent>("OpenXR"),
+            NewFeaturesSample<XRRPIExampleComponent>("OpenXR", []() { return AZ::RPI::RPISystemInterface::Get()->GetXRSystem() != nullptr; }),
             NewFeaturesSample<TonemappingExampleComponent>("Tonemapping"),
             NewFeaturesSample<TransparencyExampleComponent>("Transparency"),
             NewPerfSample<_100KDrawableExampleComponent>("100KDrawable_SingleView"),