Fix Actions on Google v2 list selection event request JSON sample

Change-Id: I780e08f93534f7309396d15bdb7ee1bbee755c5a

requests/v2/ActionsOnGoogle/EndConversationEvent.json

@@ -13,7 +13,7 @@
     ],
     "intent": {
       "name": "projects/${DIALOGFLOW_PROJECT_ID}/agent/intents/1777d616-a5f7-4838-a9a9-870f2956bd14",
-      "displayName": "Dialogflow action name of matched intent"
+      "displayName": "Dialogflow intent name of matched intent"
     },
     "intentDetectionConfidence": 1,
     "diagnosticInfo": {},

requests/v2/ActionsOnGoogle/ListSelectionEvent.json

@@ -1,12 +1,57 @@
 {
-  "platform": "ACTIONS_ON_GOOGLE",
-  "query": "actions_intent_OPTION",
-  "arguments": {
-    "input": {
-      "OPTION": "key of selected item"
+  "responseId": "ea166558-615a-48f3-ae5b-7f55d895784b",
+  "queryResult": {
+    "queryText": "actions_intent_OPTION",
+    "action": "",
+    "parameters": {},
+    "allRequiredParamsPresent": true,
+    "fulfillmentText": "",
+    "fulfillmentMessages": [],
+    "outputContexts": [
+      {
+        "name": "projects/${PROJECTID}/agent/sessions/${SESSIONID}/contexts/actions_intent_option",
+        "parameters": {
+          "OPTION": "key of selected item"
+        }
+      }
+    ],
+    "intent": {
+      "name": "projects/${PROJECTID}/agent/intents/1777d616-a5f7-4838-a9a9-870f2956bd14",
+      "displayName": "Dialogflow intent name of matched intent"
     },
-    "list": [
-      "key of selected item"
-    ]
-  }
-}
+    "intentDetectionConfidence": 1,
+    "diagnosticInfo": {},
+    "languageCode": "en-us"
+  },
+  "originalDetectIntentRequest": {
+    "source": "google",
+    "version": "2",
+    "payload": {
+      "isInSandbox": true,
+      "surface": {
+        "capabilities": []
+      },
+      "inputs": [
+        {
+          "rawInputs": [
+            {
+              "query": "Title of selected item",
+              "inputType": "TOUCH"
+            }
+          ],
+          "arguments": [
+            {
+              "textValue": "Key of selected item",
+              "name": "OPTION"
+            }
+          ],
+          "intent": "actions.intent.OPTION"
+        }
+      ],
+      "user": {},
+      "conversation": {},
+      "availableSurfaces": []
+    }
+  },
+  "session": "projects/${PROJECTID}/agent/sessions/${SESSIONID}"
+}

responses/v2/ActionsOnGoogle/RichResponses/ListResponse.json

@@ -20,7 +20,7 @@
             "items": [
               {
                 "optionInfo": {
-                  "key": "first title"
+                  "key": "first title key"
                 },
                 "description": "first description",
                 "image": {