am 6d72f725: Merge change If32b488b into eclair-mr2

Merge commit '6d72f725f18a63afd68f14cc1e2ff8f21d254c77' into eclair-mr2-plus-aosp

* commit '6d72f725f18a63afd68f14cc1e2ff8f21d254c77':
  Add new unit test for RadioGroup/RadioButton.