Restore the default interface MTU when disconnecting from Wi-Fi AP.

Bug: 113350007
Test: atest FrameworksNetTests NetworkStackTests
Test: atest NetworkStackIntegrationTests
Test: manual test

Change-Id: I709a504885033a330b946de402a261d341f78117
diff --git a/tests/integration/Android.bp b/tests/integration/Android.bp
index ec8257f..ec16467 100644
--- a/tests/integration/Android.bp
+++ b/tests/integration/Android.bp
@@ -23,6 +23,7 @@
         "androidx.annotation_annotation",
         "androidx.test.rules",
         "mockito-target-extended-minus-junit4",
+        "net-tests-utils",
         "NetworkStackBase",
         "testables",
     ],