diff --git a/framework-t/src/android/net/EthernetNetworkSpecifier.java b/framework-t/src/android/net/EthernetNetworkSpecifier.java
index 62c5761..925d12b 100644
--- a/framework-t/src/android/net/EthernetNetworkSpecifier.java
+++ b/framework-t/src/android/net/EthernetNetworkSpecifier.java
@@ -23,8 +23,6 @@
 import android.os.Parcelable;
 import android.text.TextUtils;
 
-import com.android.internal.util.Preconditions;
-
 import java.util.Objects;
 
 /**
@@ -47,7 +45,9 @@
      * @param interfaceName Name of the ethernet interface the specifier refers to.
      */
     public EthernetNetworkSpecifier(@NonNull String interfaceName) {
-        Preconditions.checkStringNotEmpty(interfaceName);
+        if (TextUtils.isEmpty(interfaceName)) {
+            throw new IllegalArgumentException();
+        }
         mInterfaceName = interfaceName;
     }
 
diff --git a/framework-t/src/android/net/TrafficStats.java b/framework-t/src/android/net/TrafficStats.java
index 032bc3f..1af32bf 100644
--- a/framework-t/src/android/net/TrafficStats.java
+++ b/framework-t/src/android/net/TrafficStats.java
@@ -282,6 +282,18 @@
     }
 
     /**
+     * Set active tag to use when accounting {@link Socket} traffic originating
+     * from the current thread. The tag used internally is well-defined to
+     * distinguish all download provider traffic.
+     *
+     * @hide
+     */
+    @SystemApi
+    public static void setThreadStatsTagDownload() {
+        setThreadStatsTag(TAG_SYSTEM_DOWNLOAD);
+    }
+
+    /**
      * Get the active tag used when accounting {@link Socket} traffic originating
      * from the current thread. Only one active tag per thread is supported.
      * {@link #tagSocket(Socket)}.