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/include/fbjni/ReadableByteChannel.h

@@ -0,0 +1,22 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the LICENSE
+ * file in the root directory of this source tree.
+ */
+#pragma once
+
+#include <fbjni/fbjni.h>
+#include <fbjni/ByteBuffer.h>
+
+namespace facebook {
+namespace jni {
+
+class JReadableByteChannel : public JavaClass<JReadableByteChannel> {
+public:
+  static constexpr const char* kJavaDescriptor = "Ljava/nio/channels/ReadableByteChannel;";
+
+  int read(alias_ref<JByteBuffer> dest) const;
+};
+
+}}