Add WiFi Enterprise restrictions check for WiFi Configuration Addition

When UserManager.DISALLOW_ADD_WIFI_CONFIG is set to true.
  - Disable the "Add network" item in the Internet settings.

  - Activity action API for ACTION_WIFI_ADD_NETWORKS should not be
    permitted and the user shouldn’t see a prompt for approval

Bug: 203169077
Test: make RunSettingsRoboTests ROBOTEST_FILTER=NetworkProviderSettingsTest
Test: make RunSettingsRoboTests ROBOTEST_FILTER=AddAppNetworksActivityTest
Change-Id: I18d7703b5972bfbc12dca10b6432d756813abace

tests/robotests/src/com/android/settings/wifi/AddWifiNetworkPreferenceTest.java

@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.settings.wifi;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.os.UserManager;
+
+import androidx.test.core.app.ApplicationProvider;
+
+import com.android.settings.R;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.RuntimeEnvironment;
+
+@RunWith(RobolectricTestRunner.class)
+public class AddWifiNetworkPreferenceTest {
+
+    private Context mContext;
+    private AddWifiNetworkPreference mPreference;
+
+    @Mock
+    private UserManager mUserManager;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+
+        mContext = spy(ApplicationProvider.getApplicationContext());
+        when(mContext.getSystemService(UserManager.class)).thenReturn(mUserManager);
+        mPreference = new AddWifiNetworkPreference(mContext);
+
+    }
+
+    @Test
+    public void updatePreferenceForRestriction_isAddWifiConfigAllowed_prefIsEnabled() {
+        mPreference.mIsAddWifiConfigAllow = true;
+
+        mPreference.updatePreferenceForRestriction();
+
+        assertThat(mPreference.isEnabled()).isTrue();
+        assertThat(mPreference.getSummary()).isNull();
+    }
+
+    @Test
+    public void updatePreferenceForRestriction_isAddWifiConfigNotAllowed_prefIsDisabled() {
+        mPreference.mIsAddWifiConfigAllow = false;
+
+        mPreference.updatePreferenceForRestriction();
+
+        assertThat(mPreference.isEnabled()).isFalse();
+        assertThat(mPreference.getSummary())
+                .isEqualTo(mContext.getString(R.string.not_allowed_by_ent));
+    }
+}

tests/robotests/src/com/android/settings/wifi/addappnetworks/AddAppNetworksActivityTest.java

@@ -47,6 +47,7 @@ public class AddAppNetworksActivityTest {
 
         mActivity = Robolectric.buildActivity(AddAppNetworksActivity.class).create().get();
         mActivity.mActivityManager = mIActivityManager;
+        mActivity.mIsAddWifiConfigAllow = true;
     }
 
     @Test
@@ -77,6 +78,13 @@ public class AddAppNetworksActivityTest {
         assertThat(mActivity.showAddNetworksFragment()).isTrue();
     }
 
+    @Test
+    public void showAddNetworksFragment_isAddWifiConfigNotAllow_returnFalse() {
+        mActivity.mIsAddWifiConfigAllow = false;
+
+        assertThat(mActivity.showAddNetworksFragment()).isFalse();
+    }
+
     private void fakeCallingPackage(@Nullable String packageName) {
         try {
             when(mIActivityManager.getLaunchedFromPackage(any())).thenReturn(packageName);