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
diff --git a/res/values/themes.xml b/res/values/themes.xml
index 873216d..b172b21 100644
--- a/res/values/themes.xml
+++ b/res/values/themes.xml
@@ -202,6 +202,9 @@
 
     <style name="Theme.BottomDialog" parent="@*android:style/Theme.DeviceDefault.Settings.Dialog">
         <item name="android:windowBackground">@drawable/settings_panel_background</item>
+        <item name="android:dividerHorizontal">@*android:drawable/list_divider_material</item>
+        <item name="android:windowNoTitle">true</item>
+        <item name="android:fontFamily">@*android:string/config_headlineFontFamilyMedium</item>
     </style>
 
 </resources>