Add more debug log when onBlockedStatusChanged was called.

Bug: 118355916
Test: 1. runtest frameworks-net
      2. enable/disable battery saver

Change-Id: I6d5f9b49be0defd531fc7ea824668bec7863c4b7

services/core/java/com/android/server/ConnectivityService.java

@@ -5168,6 +5168,7 @@ public class ConnectivityService extends IConnectivityManager.Stub
                 break;
             }
             case ConnectivityManager.CALLBACK_BLK_CHANGED: {
+                maybeLogBlockedStatusChanged(nri, networkAgent.network, arg1 != 0);
                 msg.arg1 = arg1;
                 break;
             }