am ee9d38ff: am 40765a4a: am 2ef3952d: cherrypick from jb-mr2-docs docs: Android training for Activity testing. Change-Id: I7167732c849d5a4a36c808cc852ddfcdc8e60bd7

* commit 'ee9d38ff24358774d194108128e99f09d08ddf8e':
  cherrypick from jb-mr2-docs docs: Android training for Activity testing. Change-Id: I7167732c849d5a4a36c808cc852ddfcdc8e60bd7