AR project to candidate registry, set api compatibility to .NET 4.x

FunctionalTests/AR/ARCore/Packages/manifest.json

@@ -44,5 +44,6 @@
     "com.unity.modules.vr": "1.0.0",
     "com.unity.modules.wind": "1.0.0",
     "com.unity.modules.xr": "1.0.0"
-  }
+  },
+  "registry": "https://artifactory.prd.cds.internal.unity3d.com/artifactory/api/npm/upm-candidates"
 }

FunctionalTests/AR/ARFoundation/Packages/manifest.json

@@ -60,5 +60,5 @@
     "com.unity.modules.wind": "1.0.0",
     "com.unity.modules.xr": "1.0.0"
   },
-  "registry": "https://staging-packages.unity.com"
+  "registry": "https://artifactory.prd.cds.internal.unity3d.com/artifactory/api/npm/upm-candidates"
 }

FunctionalTests/VR/CrossPlatform/ProjectSettings/ProjectSettings.asset

@@ -636,7 +636,9 @@ PlayerSettings:
   scriptingRuntimeVersion: 1
   gcIncremental: 0
   gcWBarrierValidation: 0
-  apiCompatibilityLevelPerPlatform: {}
+  apiCompatibilityLevelPerPlatform:
+    Android: 3
+    Standalone: 3
   m_RenderingPath: 1
   m_MobileRenderingPath: 1
   metroPackageName: Oculus