Summary:
Currently on iOS animations are being performed on the JS thread. This ports animations over to the native thread and performs them natively. A lot of this work has already been done on Android, but this PR enables a few animation nodes that Android doesn't yet support such as Transform, Multiplication, and Addition nodes.
Also there is a demo of the native animations added to the UIExplorer app.
Closes https://github.com/facebook/react-native/pull/7884
Differential Revision: D3401811
Pulled By: nicklockwood
fbshipit-source-id: c8d750b75e4410923e17eaeb6dcaf079a09942e2
Brandon Withrow