Update SettingsPanel UI

UI changes include:
- RecyclerView to host slices
- Font family to headline font
- Title is now centered
- Added SeeMore & Done buttons
- Horizontal Dividers between slices
- Indented Slices
- Landscape layout is fullscreen

Change-Id: I3549c847fc88edd81f670ddfa2907dd3741441e0
Screenshot: https://screenshot.googleplex.com/RzWktzOZJkc
Test: Robolectric
Test: Manual app
Bug: 118622007

tests/robotests/src/com/android/settings/panel/PanelSlicesAdapterTest.java

@@ -0,0 +1,97 @@
+/*
+ * 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.panel;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.spy;
+
+import android.content.Context;
+import android.view.ViewGroup;
+import android.widget.FrameLayout;
+
+import com.android.settings.R;
+import com.android.settings.testutils.FakeFeatureFactory;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+
+import org.junit.Before;
+import org.junit.runner.RunWith;
+import org.robolectric.Robolectric;
+
+import org.junit.Test;
+
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.android.controller.ActivityController;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+public class PanelSlicesAdapterTest {
+
+    private Context mContext;
+    private PanelFragment mPanelFragment;
+    private FakePanelContent mFakePanelContent;
+    private FakeFeatureFactory mFakeFeatureFactory;
+    private PanelFeatureProvider mPanelFeatureProvider;
+
+    private PanelSlicesAdapter mAdapter;
+
+    @Before
+    public void setUp() {
+        mContext = RuntimeEnvironment.application;
+
+        final ActivityController<FakeSettingsPanelActivity> activityController =
+                Robolectric.buildActivity(FakeSettingsPanelActivity.class);
+        activityController.setup();
+
+        mPanelFragment =
+                spy((PanelFragment)
+                        activityController
+                                .get()
+                                .getSupportFragmentManager()
+                                .findFragmentById(R.id.main_content));
+
+        mPanelFeatureProvider = spy(new PanelFeatureProviderImpl());
+        mFakeFeatureFactory = FakeFeatureFactory.setupForTest();
+        mFakeFeatureFactory.panelFeatureProvider = mPanelFeatureProvider;
+        mFakePanelContent = new FakePanelContent();
+        doReturn(mFakePanelContent).when(mPanelFeatureProvider).getPanel(any(), any());
+
+        mAdapter = new PanelSlicesAdapter(mPanelFragment, mFakePanelContent.getSlices());
+    }
+
+    @Test
+    public void onCreateViewHolder_returnsSliceRowViewHolder() {
+        final ViewGroup view = new FrameLayout(mContext);
+        final PanelSlicesAdapter.SliceRowViewHolder viewHolder =
+                mAdapter.onCreateViewHolder(view, 0);
+
+        assertThat(viewHolder.sliceView).isNotNull();
+    }
+
+    @Test
+    public void onBindViewHolder_bindsSlice() {
+        final int position = 0;
+        final ViewGroup view = new FrameLayout(mContext);
+        final PanelSlicesAdapter.SliceRowViewHolder viewHolder =
+                mAdapter.onCreateViewHolder(view, 0 /* view type*/);
+
+        mAdapter.onBindViewHolder(viewHolder, position);
+
+        assertThat(viewHolder.sliceLiveData).isNotNull();
+    }
+}