Simplify memory model between managed and unmanaged memory

Summary: Instead of having different lifetimes for java and c memory we can can tie them together and make them much easier to manage. This also leads to automatically pooling native memory if pooling java memory.

Differential Revision: D4051454

fbshipit-source-id: 8f5d010be520b3d1c981a7f85e5e6d95773ea6c1

java/com/facebook/csslayout/CSSNodeAPI.java

@@ -88,6 +88,5 @@ public interface CSSNodeAPI<CSSNodeType extends CSSNodeAPI> {
   void setOverflow(CSSOverflow overflow);
   void setData(Object data);
   Object getData();
-  void reinit();
-  void free();
+  void reset();
 }