Delete all of the tools/ directory, but save the adk files by moving them up. Redirects for all the tools/ files are already in Piper\'s site-android/en/_redirects.yaml file. The new adk redirects are in this cl: https://critique.corp.google.com/#review/121302608
am: 41f7ff9150

* commit '41f7ff915033ebc8b2210e306cba99c4173a2285':
  Delete all of the tools/ directory, but save the adk files by moving them up. Redirects for all the tools/ files are already in Piper's site-android/en/_redirects.yaml file. The new adk redirects are in this cl: https://critique.corp.google.com/#review/121302608

Change-Id: Ib2c3b9bfe2ac1899005c2ef00c3f73dae471032b