am 40765a4a: am 2ef3952d: cherrypick from jb-mr2-docs docs: Android training for Activity testing. Change-Id: I7167732c849d5a4a36c808cc852ddfcdc8e60bd7

* commit '40765a4a5300914e8c7ce7ed6397cec7ab8d78a1':
  cherrypick from jb-mr2-docs docs: Android training for Activity testing. Change-Id: I7167732c849d5a4a36c808cc852ddfcdc8e60bd7