WidgetTray revamp work
- RecyclerView is rendering
- Animation is connected
- Drag and drop is now handled
- UI tweaking: background, margins, more to come.
- Flicker and preview not loading issue:
  fixed height for the horizontal scroll view.
- Shortcuts are added
- Widget Preview loading should support shortPress for drop
- UI tweaks left: overlay of arrow when there are more items to scroll
- icons are added in the section header
- Sorting of widget sections and widget horizontal list
- Adding all the padding constants to dimen.xml file
- RecyclerView should only support one view type

For items to be addressed in follow up patches OR CLs,
TODO is added to the comment.

b/19897708

Change-Id: Ibfc4da1696a23d20bada93db46e126706eb13cdc
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index 735373d..7c99278 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -60,18 +60,9 @@
     <dimen name="apps_view_fast_scroll_text_size">40dp</dimen>
 
 <!-- AllApps/Customize/AppsCustomize -->
-    <!-- The height of the tab bar - if this changes, we should update the
-         external icon width/height above to compensate -->
-    <dimen name="apps_customize_tab_bar_height">52dp</dimen>
-    <dimen name="apps_customize_tab_bar_margin_top">0dp</dimen>
     <dimen name="app_icon_size">48dp</dimen>
     <dimen name="apps_customize_horizontal_padding">0dp</dimen>
 
-    <!-- The AppsCustomize page indicator -->
-    <dimen name="apps_customize_page_indicator_height">12dp</dimen>
-    <dimen name="apps_customize_page_indicator_margin">4dp</dimen>
-    <dimen name="apps_customize_page_indicator_offset">16dp</dimen>
-
     <!-- Drag padding to add to the bottom of drop targets -->
     <dimen name="drop_target_drag_padding">14dp</dimen>
     <dimen name="drop_target_text_size">14sp</dimen>
@@ -85,12 +76,19 @@
           should be. If 0, it will not be scaled at all. -->
     <dimen name="dragViewScale">12dp</dimen>
 
-    <!-- Padding applied to AppWidget previews -->
-    <dimen name="app_widget_preview_padding_left">16dp</dimen>
-    <dimen name="app_widget_preview_padding_right">16dp</dimen>
-    <dimen name="app_widget_preview_padding_top">32dp</dimen>
-    <dimen name="app_widget_preview_label_vertical_padding">8dp</dimen>
-    <dimen name="app_widget_preview_label_horizontal_padding">8dp</dimen>
+<!-- Widget tray -->
+    <dimen name="widget_container_inset">8dp</dimen>
+    <dimen name="widget_preview_size">140dp</dimen>
+    <dimen name="widget_preview_padding_left">16dp</dimen>
+    <dimen name="widget_preview_padding_right">16dp</dimen>
+    <dimen name="widget_preview_padding_top">8dp</dimen>
+    <dimen name="widget_preview_label_vertical_padding">8dp</dimen>
+    <dimen name="widget_preview_label_horizontal_padding">8dp</dimen>
+
+    <dimen name="widget_section_height">52dp</dimen>
+    <dimen name="widget_section_icon_padding">8dp</dimen>
+
+    <dimen name="widget_cell_height">160dp</dimen>
 
     <!-- Padding applied to shortcut previews -->
     <dimen name="shortcut_preview_padding_left">0dp</dimen>