Add YogaNodeProperties implementation based on ByteBuffer

Summary:
@public
Adds an implementation of `YogaNodeProperties` that accesses style and layout properties using a `ByteBuffer` rather than JNI calls.
We hope for a speed improvement.

This needs further cleanup after experimenting, e.g. to codegen the offsets.

Reviewed By: pasqualeanatriello

Differential Revision: D8911723

fbshipit-source-id: 3c24b57eb545155878896ebb5d64d4553eb6bedc

java/BUCK

@@ -8,6 +8,7 @@ load("//:yoga_defs.bzl", "ANDROID", "CXX_LIBRARY_WHITELIST", "FBJNI_JAVA_TARGET"
 yoga_cxx_library(
     name = "jni",
     srcs = glob(["jni/*.cpp"]),
+    headers = glob(["jni/*.h"]),
     header_namespace = "",
     compiler_flags = [
         "-fno-omit-frame-pointer",