Replace checkNetworkStackPermission in TestNetworkService

Use the underlying PermissionUtils directly instead.

Bug: 178352309
Change-Id: I840a7b7d53531604a214b73f1f518b2ebb10e71e
Test: atest FrameworksNetTests
diff --git a/services/core/java/com/android/server/TestNetworkService.java b/services/core/java/com/android/server/TestNetworkService.java
index 96f832d..1b1aca3 100644
--- a/services/core/java/com/android/server/TestNetworkService.java
+++ b/services/core/java/com/android/server/TestNetworkService.java
@@ -32,7 +32,6 @@
 import android.net.NetworkAgentConfig;
 import android.net.NetworkCapabilities;
 import android.net.NetworkProvider;
-import android.net.NetworkStack;
 import android.net.RouteInfo;
 import android.net.StringNetworkSpecifier;
 import android.net.TestNetworkInterface;
@@ -51,6 +50,7 @@
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.net.module.util.NetdUtils;
 import com.android.net.module.util.NetworkStackConstants;
+import com.android.net.module.util.PermissionUtils;
 
 import java.io.UncheckedIOException;
 import java.net.Inet4Address;
@@ -324,7 +324,7 @@
         try {
             final long token = Binder.clearCallingIdentity();
             try {
-                NetworkStack.checkNetworkStackPermission(mContext);
+                PermissionUtils.enforceNetworkStackPermission(mContext);
                 NetdUtils.setInterfaceUp(mNetd, iface);
             } finally {
                 Binder.restoreCallingIdentity(token);