Upgrade fbjni

Summary:
Upgrades Yoga’s copy of *fbjni* to the latest version.

This will enable us

- to move from `finalize()` to `PhantomReference` to deallocate native memory, with the potential of making GC more efficient.
- to remove the internal dependency to *libfb,* allowing apps without an own dependency to ship less code

Reviewed By: passy

Differential Revision: D16220924

fbshipit-source-id: e8233fe2b5403946ff51f43cb6def558ded52fda

lib/fb/src/main/cpp/jni/OnLoad.cpp

@@ -4,16 +4,15 @@
  * This source code is licensed under the MIT license found in the LICENSE
  * file in the root directory of this source tree.
  */
-#include <jni/Countable.h>
-#include <fb/Environment.h>
-#include <fb/fbjni.h>
-#include <fb/fbjni/NativeRunnable.h>
+#include <fbjni/fbjni.h>
+#include <fbjni/NativeRunnable.h>
 
 using namespace facebook::jni;
 
-void initialize_fbjni() {
-  CountableOnLoad(Environment::current());
-  HybridDataOnLoad();
-  JNativeRunnable::OnLoad();
-  ThreadScope::OnLoad();
+JNIEXPORT jint JNI_OnLoad(JavaVM* vm, void* reserved) {
+  return facebook::jni::initialize(vm, [] {
+    HybridDataOnLoad();
+    JNativeRunnable::OnLoad();
+    ThreadScope::OnLoad();
+  });
 }