Add option for settings to push to a device index

The index implementation is optional and left up to the OEM.

Test: Open settings, see content in index
Test: robo tests
Bug: 68378569
Bug: 76102600
Change-Id: Idb8bb1e0cabbbe92e7a852e2eadbdcd8c2ab7d56

tests/robotests/src/com/android/settings/search/DeviceIndexFeatureProviderTest.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2018 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.search;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.atLeastOnce;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.app.Activity;
+
+import com.android.settings.testutils.FakeFeatureFactory;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.Robolectric;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+public class DeviceIndexFeatureProviderTest {
+
+    private DeviceIndexFeatureProvider mProvider;
+    private Activity mActivity;
+
+    @Before
+    public void setUp() {
+        FakeFeatureFactory.setupForTest();
+        mActivity = Robolectric.buildActivity(Activity.class).create().visible().get();
+        mProvider = spy(new DeviceIndexFeatureProviderImpl());
+    }
+
+    @Test
+    public void verifyDisabled() {
+        when(mProvider.isIndexingEnabled()).thenReturn(false);
+
+        mProvider.updateIndex(mActivity, false);
+        verify(mProvider, never()).index(any(), any(), any(), any());
+    }
+
+    @Test
+    public void verifyIndexing() {
+        when(mProvider.isIndexingEnabled()).thenReturn(true);
+
+        mProvider.updateIndex(mActivity, false);
+        verify(mProvider, atLeastOnce()).index(any(), any(), any(), any());
+    }
+}