Restrict WifiDppConfiguratorActivity

- Don't show WifiDppConfiguratorActivity if user has DISALLOW_ADD_WIFI_CONFIG

- Don't show AddNetworkFragment if user has DISALLOW_ADD_WIFI_CONFIG

Fix: 299931076
Flag: None
Test: manual test with TestDPC
atest -c SettingsUnitTests:AddNetworkFragmentTest \
         SettingsUnitTests:WifiDppConfiguratorActivityTest

Change-Id: I34afe0f698e2dc43eba59b25f5f3f4f61e70166a

src/com/android/settings/wifi/dpp/WifiDppConfiguratorActivity.java

@@ -16,6 +16,8 @@
 
 package com.android.settings.wifi.dpp;
 
+import static android.os.UserManager.DISALLOW_ADD_WIFI_CONFIG;
+
 import android.app.settings.SettingsEnums;
 import android.content.Context;
 import android.content.Intent;
@@ -99,6 +101,10 @@ public class WifiDppConfiguratorActivity extends WifiDppBaseActivity implements
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        if (!isAddWifiConfigAllowed(getApplicationContext())) {
+            finish();
+            return;
+        }
 
         if (savedInstanceState != null) {
             String qrCode = savedInstanceState.getString(KEY_QR_CODE);
@@ -119,6 +125,10 @@ public class WifiDppConfiguratorActivity extends WifiDppBaseActivity implements
 
     @Override
     protected void handleIntent(Intent intent) {
+        if (!isAddWifiConfigAllowed(getApplicationContext())) {
+            finish();
+            return;
+        }
         if (isGuestUser(getApplicationContext())) {
             Log.e(TAG, "Guest user is not allowed to configure Wi-Fi!");
             EventLog.writeEvent(0x534e4554, "224772890", -1 /* UID */, "User is a guest");
@@ -402,4 +412,14 @@ public class WifiDppConfiguratorActivity extends WifiDppBaseActivity implements
         if (userManager == null) return false;
         return userManager.isGuestUser();
     }
+
+    @VisibleForTesting
+    static boolean isAddWifiConfigAllowed(Context context) {
+        UserManager userManager = context.getSystemService(UserManager.class);
+        if (userManager != null && userManager.hasUserRestriction(DISALLOW_ADD_WIFI_CONFIG)) {
+            Log.e(TAG, "The user is not allowed to add Wi-Fi configuration.");
+            return false;
+        }
+        return true;
+    }
 }