Sync fbjni copy with upstream

Summary: Merge upstream fbjni into our copy.

Reviewed By: priteshrnandgaonkar

Differential Revision: D16828183

fbshipit-source-id: 720f7411d4327870c01d3f70e9d2b03909362795

libs/fbjni/java/com/facebook/jni/HybridData.java

@@ -65,7 +65,7 @@ public class HybridData {
     }
 
     @Override
-    void destruct() {
+    protected final void destruct() {
       // When invoked from the DestructorThread instead of resetNative,
       // the DestructorThread has exclusive ownership of the HybridData
       // so synchronization is not necessary.