Merge changes from topic "cherrypicker-L56500000960243519:N87700001362502878" into udc-dev

* changes:
  [automerge] Add MdnsServiceCache 2p: 9d9ae4d2a1
  Add MdnsServiceCache
diff --git a/service-t/src/com/android/server/net/NetworkStatsService.java b/service-t/src/com/android/server/net/NetworkStatsService.java
index 961337d..c660792 100644
--- a/service-t/src/com/android/server/net/NetworkStatsService.java
+++ b/service-t/src/com/android/server/net/NetworkStatsService.java
@@ -946,7 +946,11 @@
     @GuardedBy("mStatsLock")
     private void shutdownLocked() {
         final TetheringManager tetheringManager = mContext.getSystemService(TetheringManager.class);
-        tetheringManager.unregisterTetheringEventCallback(mTetherListener);
+        try {
+            tetheringManager.unregisterTetheringEventCallback(mTetherListener);
+        } catch (IllegalStateException e) {
+            Log.i(TAG, "shutdownLocked: error when unregister tethering, ignored. e=" + e);
+        }
         mContext.unregisterReceiver(mPollReceiver);
         mContext.unregisterReceiver(mRemovedReceiver);
         mContext.unregisterReceiver(mUserReceiver);