am 2a33840c: Updated Contacts assets (dialer buttons, hdpi)

Merge commit '2a33840ce80271675857d4b802dc17f6a3bb22dc' into gingerbread-plus-aosp

* commit '2a33840ce80271675857d4b802dc17f6a3bb22dc':
  Updated Contacts assets (dialer buttons, hdpi)