Add license information for Android Things Factory Tool. am: 765bee3844 am: 9f6ccf9a15 am: 432833065c
am: 9faa8bedf8

Change-Id: I44d6a9d2a9871a55db92dd2f94876b2a85c3cfe1
tree: f5a994b557726909ab1460ee1e2ccdf8f033c122
  1. at-factory-tool/
  2. atap/
  3. partner-tools/
  4. MODULE_LICENSE_APACHE2
  5. NOTICE