Latest UX asset drop, grid padding.

Bring in latest asset drop.  Apply grid padding programmatically
instead of waiting for asset.  Remove alpha from directory animation.

Update save footer background to match spec.

Bug: 10700025
Change-Id: I8eef08f36d04767b78e91b23f72bdbebfbb02f58
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index 25b0f84..4a93cdb 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -20,6 +20,9 @@
     <dimen name="grid_width">180dp</dimen>
     <dimen name="grid_height">180dp</dimen>
 
+    <dimen name="grid_padding">4dp</dimen>
+    <dimen name="grid_padding_horiz">4dp</dimen>
+
     <bool name="show_as_dialog">false</bool>
     <bool name="always_show_summary">false</bool>
 </resources>