am 80c4cd1f: am bd9d9d3a: cherrypick from hc-mr2, updated adk installation instructions Change-Id: I6a0e21a79b81c3383d1fa05a4893bab5626dbe05

* commit '80c4cd1fd7d44fcacbff7d4903ce227eb3add1e3':
  cherrypick from hc-mr2, updated adk installation instructions Change-Id: I6a0e21a79b81c3383d1fa05a4893bab5626dbe05