Move Documents action bar update even later.

At some point Activity started restoring the Toolbar/ActionBar title
during onPostCreate(), which would clobber some of the setup we just
finished doing.  To fix, move our update to be even later in the
restore lifecycle.

Also fix grid item widths for small screen devices.

Bug: 17428127
Change-Id: I258121b6a6eec5924f92b02290a67d3ae7dd9cf6
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index d4d7ede..06f65e2 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -18,10 +18,10 @@
     <dimen name="icon_size">40dp</dimen>
     <dimen name="root_icon_size">24dp</dimen>
 
-    <dimen name="grid_width">160dp</dimen>
+    <dimen name="grid_width">152dp</dimen>
     <dimen name="grid_height">176dp</dimen>
 
-    <dimen name="grid_item_width">160dp</dimen>
+    <dimen name="grid_item_width">152dp</dimen>
     <dimen name="grid_item_height">176dp</dimen>
     <dimen name="grid_item_padding">4dp</dimen>