Add Hand Driver Demo sample

package.json

@@ -7,6 +7,13 @@
   "author": {
     "name": "Udexreal"
   },
-  "dependencies": {
+"dependencies": {
-  }
+  },
-}
+  "samples": [
+    {
+      "displayName": "Hand Driver Demo",
+      "description": "Example scene for Hand Driver.",
+      "path": "Samples~/Hand Driver Demo"
+    }
+  ]
+}