Update fbjni

Summary: Update yoga's copy of fbjni to include some missing java files.

Reviewed By: IanChilds

Differential Revision: D4953841

fbshipit-source-id: 74d5c617a6fcd11e82c86f03e61448b14a34b86b

lib/fb/src/main/java/com/facebook/jni/Countable.java

@@ -0,0 +1,35 @@
+// Copyright 2004-present Facebook. All Rights Reserved.
+
+package com.facebook.jni;
+
+import com.facebook.proguard.annotations.DoNotStrip;
+import com.facebook.soloader.SoLoader;
+
+/**
+ * A Java Object that has native memory allocated corresponding to this instance.
+ *
+ * NB: THREAD SAFETY (this comment also exists at Countable.cpp)
+ *
+ * {@link #dispose} deletes the corresponding native object on whatever thread the method is called
+ * on. In the common case when this is called by Countable#finalize(), this will be called on the
+ * system finalizer thread. If you manually call dispose on the Java object, the native object
+ * will be deleted synchronously on that thread.
+ */
+@DoNotStrip
+public class Countable {
+
+  static {
+    SoLoader.loadLibrary("fb");
+  }
+
+  // Private C++ instance
+  @DoNotStrip
+  private long mInstance = 0;
+
+  public native void dispose();
+
+  protected void finalize() throws Throwable {
+    dispose();
+    super.finalize();
+  }
+}