John Reck ce9f308063 Fix dirty calculation for layer updates
Bug: 15682142

 Defer early return of alpha <= 0 for damage accumulation until
 popTransform() so that layer updates will be performed regardless
 of alpha

Change-Id: Ifb94dd3ed2d96d610e6f2f3071933903016273a5
2014-06-18 07:19:50 -07:00
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