Update API usage for setAlwaysOnPackage

Fix: 28614160
Change-Id: Id49432d1f3acac9199007f990886ddcbb04adc5e

Author: hex539

app/src/main/java/com/afwsamples/testdpc/policy/networking/AlwaysOnVpnFragment.java

@@ -18,6 +18,7 @@
 
 import android.annotation.TargetApi;
 import android.app.admin.DevicePolicyManager;
+import android.content.ComponentName;
 import android.content.Context;
 import android.content.pm.PackageManager;
 import android.os.Build;
@@ -56,7 +57,8 @@ public void onResume() {
     @Override
     protected void setSelectedPackage(String pkg) {
         try {
-            mDpm.setAlwaysOnVpnPackage(DeviceAdminReceiver.getComponentName(getActivity()), pkg);
+            final ComponentName who = DeviceAdminReceiver.getComponentName(getActivity());
+            mDpm.setAlwaysOnVpnPackage(who, pkg, /* lockdownEnabled */ true);
         } catch (PackageManager.NameNotFoundException | UnsupportedOperationException e) {
             if (pkg != null) {
                 clearSelectedPackage();