Add Always on VPN to Privacy Settings page

This CL adds information about always-on VPNs to the Enterprise
Privacy Settings page.

Test: make RunSettingsRoboTests
Bug: 32692748

Change-Id: I2b59e2ec4c55308b323aaa478cd9c847fe0b4b55

tests/robotests/src/com/android/settings/vpn2/VpnUtilsTest.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2017 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.vpn2;
+
+import com.android.settings.SettingsRobolectricTestRunner;
+import com.android.settings.TestConfig;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.annotation.Config;
+
+import static com.google.common.truth.Truth.assertThat;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+/**
+ * Tests for {@link VpnUtils}.
+ */
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public final class VpnUtilsTest {
+    @Test
+    public void testIsAlwaysOnVpnSet() {
+        final ConnectivityManagerWrapper cm = mock(ConnectivityManagerWrapper.class);
+        when(cm.getAlwaysOnVpnPackageForUser(0)).thenReturn("com.example.vpn");
+        assertThat(VpnUtils.isAlwaysOnVpnSet(cm, 0)).isTrue();
+
+        when(cm.getAlwaysOnVpnPackageForUser(0)).thenReturn(null);
+        assertThat(VpnUtils.isAlwaysOnVpnSet(cm, 0)).isFalse();
+    }
+}