Widgettray UI tweak that introduces bounding box around the widgets.

Note: waiting on more polished UX spec right now.
But until then, these padding and dimensions are what is used to get the
bounding box around the widgets.

Change-Id: I7a6a5fa04bbdb135b39291cb671b9a719fcdc4fc
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index cad60fb..da11082 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -80,7 +80,7 @@
 
 <!-- Widget tray -->
     <dimen name="widget_container_inset">8dp</dimen>
-    <dimen name="widget_preview_size">140dp</dimen>
+    <dimen name="widget_preview_size">120dp</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>
@@ -90,8 +90,8 @@
     <dimen name="widget_section_icon_padding">8dp</dimen>
 
     <!-- Equation: widget_preview_size + 2 * widget_preview_padding_horizontal -->
-    <dimen name="widget_preview_container_width">156dp</dimen>
-    <dimen name="widget_cell_height">160dp</dimen>
+    <dimen name="widget_preview_container_width">136dp</dimen>
+    <dimen name="widget_cell_height">150dp</dimen>
 
     <!-- Padding applied to shortcut previews -->
     <dimen name="shortcut_preview_padding_left">0dp</dimen>