Teng-Hui Zhu 4f1acfb5f5 Mutate the drawable if a valid state change happen
In another word, create another cached bitmap, when the current VectorDrawable
will look differently when state changed.

b/29870392

Change-Id: I7a5ef91091e547a930368286defc7ab96aeb9471
2016-06-30 16:30:02 +00:00
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