Fix some @hide usage in Tethering(Cont.)

Using alternative way to fix @hide usage. Do not have API change.

Bug: 144814072
Test: buid
Change-Id: Ia23e319ad3779318471d01cbfa17b8c6df4960d3
diff --git a/Tethering/tests/unit/jarjar-rules.txt b/Tethering/tests/unit/jarjar-rules.txt
index 64fdebd..921fbed 100644
--- a/Tethering/tests/unit/jarjar-rules.txt
+++ b/Tethering/tests/unit/jarjar-rules.txt
@@ -7,5 +7,6 @@
 rule com.android.internal.util.Preconditions* com.android.networkstack.tethering.util.Preconditions@1
 rule com.android.internal.util.State* com.android.networkstack.tethering.util.State@1
 rule com.android.internal.util.StateMachine* com.android.networkstack.tethering.util.StateMachine@1
+rule com.android.internal.util.TrafficStatsConstants* com.android.networkstack.tethering.util.TrafficStatsConstants@1
 
 rule android.net.LocalLog* com.android.networkstack.tethering.LocalLog@1