net-test: close() fixes for resilient_rs_test.py am: c90a1c1b22 am: 733dd59f5b am: f2d2ee69fd am: c638812ba5

Original change: https://android-review.googlesource.com/c/kernel/tests/+/2508301

Change-Id: If1d5439a03bddfdc2cb21dcb0c825571002c2bd7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
diff --git a/net/test/resilient_rs_test.py b/net/test/resilient_rs_test.py
index f6e022b..f53217d 100755
--- a/net/test/resilient_rs_test.py
+++ b/net/test/resilient_rs_test.py
@@ -171,5 +171,7 @@
       self.assertLess(min_exp, t)
       self.assertGreater(max_exp, t)
 
+    tun.close()
+
 if __name__ == "__main__":
   unittest.main()