Run networkstack hostside GTS tests on module changes.

Test: TH
Bug: 240650496
Change-Id: Ie813aa31ddfd41bb1699611c5361d90fede9f485

TEST_MAPPING

diff --git a/TEST_MAPPING b/TEST_MAPPING
index 1e8babf..6e30fd1 100644
--- a/TEST_MAPPING
+++ b/TEST_MAPPING
@@ -205,6 +205,9 @@
     },
     {
       "path": "packages/modules/CaptivePortalLogin"
+    },
+    {
+      "path": "vendor/xts/gts-tests/hostsidetests/networkstack"
     }
   ]
 }