Remove fb/xplat_init dependency

Summary:
This diff removes the fb/xplat_init dependency from fabric onLoad class

This is necessary to make fabric compile in OSS

changelog: [Internal] Internal

Reviewed By: RSNara

Differential Revision: D22874850

fbshipit-source-id: 0c61a366e09ab072215ba2fe651f96ef4c2e455a

ReactAndroid/src/main/java/com/facebook/react/fabric/jni/OnLoad.cpp

@@ -5,7 +5,6 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-#include <fb/xplat_init.h>
 #include <fbjni/fbjni.h>
 
 #include "Binding.h"
@@ -14,7 +13,7 @@
 #include "StateWrapperImpl.h"
 
 JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM *vm, void *) {
-  return facebook::xplat::initialize(vm, [] {
+  return facebook::jni::initialize(vm, [] {
     facebook::react::Binding::registerNatives();
     facebook::react::EventBeatManager::registerNatives();
     facebook::react::EventEmitterWrapper::registerNatives();