Use function inside NetdUtils instead of NetworkManagementService

TestNetworkService will be a part of mainline module, to prevent
using @hide API of NetworkManagementService in TestNetworkService,
use function inside NetdUtils instead.

Bug: 170598012
Test: atest CtsNetTestCasesLatestSdk
Change-Id: I738066ce2f1bcd616dc582a3ff1fd77bcd660c73

service/Android.bp

@@ -57,6 +57,7 @@ java_library {
     static_libs: [
         "net-utils-device-common",
         "net-utils-framework-common",
+        "netd-client",
     ],
     apex_available: [
         "//apex_available:platform",

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

@@ -32,6 +32,7 @@ import android.net.NetworkAgent;
 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;
@@ -48,6 +49,7 @@ import android.util.SparseArray;
 
 import com.android.internal.annotations.GuardedBy;
 import com.android.internal.annotations.VisibleForTesting;
+import com.android.net.module.util.NetdUtils;
 
 import java.io.UncheckedIOException;
 import java.net.Inet4Address;
@@ -316,10 +318,10 @@ class TestNetworkService extends ITestNetworkManager.Stub {
         }
 
         try {
-            // This requires NETWORK_STACK privileges.
             final long token = Binder.clearCallingIdentity();
             try {
-                mNMS.setInterfaceUp(iface);
+                NetworkStack.checkNetworkStackPermission(mContext);
+                NetdUtils.setInterfaceUp(mNetd, iface);
             } finally {
                 Binder.restoreCallingIdentity(token);
             }