Graduate ThreadNetworkIntegrationTests from postsubmit

Bug: 295843010

Change-Id: I47fe9f00dff804d5e9c112336c5972b6a80760cf
diff --git a/thread/TEST_MAPPING b/thread/TEST_MAPPING
index 6a5ea4b..ebbb9af 100644
--- a/thread/TEST_MAPPING
+++ b/thread/TEST_MAPPING
@@ -5,11 +5,11 @@
     },
     {
       "name": "ThreadNetworkUnitTests"
-    }
-  ],
-  "postsubmit": [
+    },
     {
       "name": "ThreadNetworkIntegrationTests"
     }
+  ],
+  "postsubmit": [
   ]
 }