am 73b58ab9: Merge lmp-dev-plus-aosp-without-vendor into stage-aosp-master

* commit '73b58ab96426d1c73467f9f2229a3e781a2980ce': (70 commits)
  Update notification listener after API change
  Update notification listener after API change
  Update NotificationListener sample after API update
  add people annotations to the showcase
  update notificaiton showcase with heads up features
  Bring NoListener example in sync with API
  simply notification listener sample
  Fix build after API change
  example notification listener
  Bring NoListener example in sync with API
  simply notification listener sample
  Fix build after API change
  example notification listener
  add people annotations to the showcase
  update notificaiton showcase with heads up features
  Remove all code from platform/experimental/PixelPerfect
  Quantum Calculator has gone to a farm upstate
  Cap the dimensions of our screenshots.
  Remove all non-platform code and clean up files.
  Pixelperfect. Reduce the jpeg quality so that screenshots do not exceed storage limits.
  ...