Temporary widget preview

 Bug: 3224879
 Updates the widget preview to a screenshot of the current widget
 as a temporary placeholder instead of the old stack widget preview.

Change-Id: I6cc574f597cd91a9ac7e37ca51b3b7d3c219d51f
diff --git a/res/drawable/preview.png b/res/drawable/preview.png
index f05710f..b363ab5 100644
--- a/res/drawable/preview.png
+++ b/res/drawable/preview.png
Binary files differ