A11y shortcut settings enhancement

Adding shortcut on/off switch, improving the service picker,
and adding a switch to enable the shortcut on the lock screen.

Also adjusted setting search code to avoid indexing the
accessibility shortcut aside from the main accessibility settings
page.

Bug: 35872328
Bug: 35219988
Test: Ran in a variety of conditions, ran existing settings test.
Also added basic robo test, verified existing robo tests pass.
Change-Id: I4da9bad74caf96d9c8f3640e7db5417b4ee5d602

tests/robotests/src/com/android/settings/accessibility/ShortcutServicePickerFragmentTest.java

@@ -0,0 +1,83 @@
+/*
+ * 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.accessibility;
+
+import android.app.Activity;
+import android.content.Context;
+import android.os.UserManager;
+
+import android.test.mock.MockContentResolver;
+import com.android.settings.SettingsRobolectricTestRunner;
+import com.android.settings.TestConfig;
+import com.android.settings.applications.PackageManagerWrapper;
+import com.android.settings.testutils.FakeFeatureFactory;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Answers;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.Shadows;
+import org.robolectric.annotation.Config;
+
+import static com.google.common.truth.Truth.assertThat;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.when;
+
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class ShortcutServicePickerFragmentTest {
+
+    private static final String TEST_SERVICE_KEY_1 = "abc/123";
+    private static final String TEST_SERVICE_KEY_2 = "abcd/1234";
+
+    private static final String SUMMARY_1 = "summary1";
+    private static final String SUMMARY_2 = "summary2";
+
+    @Mock(answer = Answers.RETURNS_DEEP_STUBS)
+    private Activity mActivity;
+    @Mock
+    private UserManager mUserManager;
+    @Mock
+    private PackageManagerWrapper mPackageManager;
+
+    private ShortcutServicePickerFragment mFragment;
+    private MockContentResolver mContentResolver;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        FakeFeatureFactory.setupForTest(mActivity);
+        when(mActivity.getSystemService(Context.USER_SERVICE)).thenReturn(mUserManager);
+
+        mFragment = spy(new ShortcutServicePickerFragment());
+        mFragment.onAttach((Context) mActivity);
+
+        doReturn(RuntimeEnvironment.application).when(mFragment).getContext();
+    }
+
+    @Test
+    public void setAndGetDefaultAppKey_shouldUpdateDefaultAppKey() {
+        assertThat(mFragment.setDefaultKey(TEST_SERVICE_KEY_1)).isTrue();
+        assertThat(mFragment.getDefaultKey()).isEqualTo(TEST_SERVICE_KEY_1);
+    }
+}
+