passing layout context and getting local reference from it

Summary: We are passing layout context from yoga as event data for Layout Pass End event and it is being then used to get the local reference of node so that we can pass it as method parameter to java layer

Reviewed By: davidaurelio

Differential Revision: D15602923

fbshipit-source-id: 54b25956af098700cea25c4f7f8ffe0b9117432c

java/BUCK

@@ -13,8 +13,8 @@ CXX_LIBRARY_WHITELIST_FOR_TESTS = CXX_LIBRARY_WHITELIST + [
 yoga_cxx_library(
     name = "jni",
     srcs = glob(["jni/*.cpp"]),
-    headers = glob(["jni/*.h"]),
-    header_namespace = "",
+    header_namespace = "yoga/java",
+    exported_headers = glob(["jni/*.h"]),
     allow_jni_merging = True,
     compiler_flags = [
         "-fno-omit-frame-pointer",