Summary:
Here we introduce an abstraction over node property storage, in order to experiment with different approaches for Java/C integration.
- interface `YogaNodeProperties` as abstraction
- current JNI code factored into `YogaNodePropertiesJNI.java`
- `YogaNode` delegates all calls, no API changes
Reviewed By: astreet
Differential Revision: D8769448
fbshipit-source-id: e67327ce41fa047a51a986c652b3d59992a510e2