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

src/com/android/settings/panel/InternetConnectivityPanel.java

@@ -19,6 +19,7 @@ package com.android.settings.panel;
 import android.content.Context;
 import android.content.Intent;
 import android.net.Uri;
+import android.provider.Settings;
 
 import com.android.settings.R;
 import com.android.settings.slices.CustomSliceRegistry;
@@ -60,6 +61,6 @@ public class InternetConnectivityPanel implements PanelContent {
 
     @Override
     public Intent getSeeMoreIntent() {
-        return null;
+        return new Intent(Settings.ACTION_WIRELESS_SETTINGS);
     }
 }