Merge remote-tracking branch 'aosp/pie-gsi' into HEAD

* aosp/pie-gsi:
  DO NOT MERGE Change the logic of ContainerLayer's isVisible()
  SurfaceFlinger: Expose construction of container layers.
  Avoid calling into HWC in onFirstRef

Change-Id: Ib6ac001c7db16c446a6c3ef51e2cfebeaf1945ff