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

* commit 'bd9d9d3ae2a758139c7dd722c4836a33b9b059a8':
  cherrypick from hc-mr2, updated adk installation instructions Change-Id: I6a0e21a79b81c3383d1fa05a4893bab5626dbe05