Fix transitions with disabled items and translucent activities.

- Floating view icon now matches the disabled state of the
  original icon.
- We only run the animator that hides the launcher content
  if launcher is in the set of closing targets. This avoids
  the flickering that occurs when the content fades out and
  then is visible again.

Bug: 73876918
Change-Id: Iddb7c8b8d74639e4ddf4044569d6f18256ff5eaa