Revert "Binder linkage no longer depends on JNI objrefs as persistent tokens"

This reverts commit c2d55dd89743c8a38deb809f3cdf1ad2d1dbac2b.
diff --git a/include/binder/IBinder.h b/include/binder/IBinder.h
index 81b56c2..749a977 100644
--- a/include/binder/IBinder.h
+++ b/include/binder/IBinder.h
@@ -98,7 +98,7 @@
      * Register the @a recipient for a notification if this binder
      * goes away.  If this binder object unexpectedly goes away
      * (typically because its hosting process has been killed),
-     * then DeathRecipient::binderDied() will be called with a reference
+     * then DeathRecipient::binderDied() will be called with a referene
      * to this.
      *
      * The @a cookie is optional -- if non-NULL, it should be a