Add shared jarjar rule for tethering tests

Also jarjar com.android.net.module.util* to
com.android.networkstack.tethering.util*.

Bug: 171670016
Test: atest TetheringCoverageTests
Change-Id: I3bde9ad3c41adf36da99bd944303d88ce992201c
diff --git a/Tethering/tests/integration/Android.bp b/Tethering/tests/integration/Android.bp
index 02bab9b..5765c01 100644
--- a/Tethering/tests/integration/Android.bp
+++ b/Tethering/tests/integration/Android.bp
@@ -79,6 +79,7 @@
         // For NetworkStackUtils included in NetworkStackBase
         "libnetworkstackutilsjni",
     ],
+    jarjar_rules: ":TetheringTestsJarJarRules",
     compile_multilib: "both",
     manifest: "AndroidManifest_coverage.xml",
-}
\ No newline at end of file
+}