Change WepNetworkDialogActivity exported="true".

Test: Visual Test
Fix: 327310887
Change-Id: Iecc2910eda75f3aad60f4a876b0e1d54d203cd74

src/com/android/settings/network/NetworkProviderSettings.java

@@ -1263,7 +1263,7 @@ public class NetworkProviderSettings extends RestrictedSettingsFragment
 
         if (Flags.androidVWifiApi() && wifiEntry.getSecurityTypes()
                 .contains(WifiEntry.SECURITY_WEP)) {
-            WepNetworkDialogActivity.checkWepAllowed(
+            WifiUtils.checkWepAllowed(
                     getContext(), getViewLifecycleOwner(), wifiEntry.getSsid(), () -> {
                         wifiEntry.connect(callback);
                         return null;