Add Input & Gesture/Language & Region pages under System.

- Removed LanguageAndInputDashboardAlias because now the contents are
  moved to new pages.

Bug: 32637613
Bug: 32643833
Test: RunSettingsRoboTests
Change-Id: Ia66a942a449a07b9cbba53bdc97738148aafadb4

tests/robotests/src/com/android/settings/inputmethod/InputAndGestureSettingsTest.java

@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2016 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.inputmethod;
+
+import android.content.Context;
+import android.hardware.input.InputManager;
+
+import com.android.settings.R;
+import com.android.settings.SettingsRobolectricTestRunner;
+import com.android.settings.TestConfig;
+import com.android.settings.core.PreferenceController;
+import com.android.settings.core.lifecycle.Lifecycle;
+import com.android.settings.core.lifecycle.LifecycleObserver;
+
+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.annotation.Config;
+
+import java.util.List;
+
+import static com.google.common.truth.Truth.assertThat;
+import static org.mockito.Matchers.any;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class InputAndGestureSettingsTest {
+
+    @Mock(answer = Answers.RETURNS_DEEP_STUBS)
+    private Context mContext;
+    private TestFragment mFragment;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        when(mContext.getSystemService(Context.INPUT_SERVICE)).thenReturn(mock(InputManager.class));
+        mFragment = new TestFragment(mContext);
+    }
+
+    @Test
+    public void testGetPreferenceScreenResId() {
+        assertThat(mFragment.getPreferenceScreenResId()).isEqualTo(R.xml.input_and_gesture);
+    }
+
+    @Test
+    public void testGetPreferenceControllers_shouldRegisterLifecycleObservers() {
+        final List<PreferenceController> controllers = mFragment.getPreferenceControllers(mContext);
+        int lifecycleObserverCount = 0;
+        for (PreferenceController controller : controllers) {
+            if (controller instanceof LifecycleObserver) {
+                lifecycleObserverCount++;
+            }
+        }
+        verify(mFragment.getLifecycle(), times(lifecycleObserverCount))
+                .addObserver(any(LifecycleObserver.class));
+    }
+
+    public static class TestFragment extends InputAndGestureSettings {
+
+        private Lifecycle mLifecycle;
+        private Context mContext;
+
+        public TestFragment(Context context) {
+            mContext = context;
+            mLifecycle = mock(Lifecycle.class);
+        }
+
+        @Override
+        public Context getContext() {
+            return mContext;
+        }
+
+        @Override
+        protected Lifecycle getLifecycle() {
+            if (mLifecycle == null) {
+                return super.getLifecycle();
+            }
+            return mLifecycle;
+        }
+    }
+}