Fixing several regressions with affiliated tasks.

- Now that we are sorting tasks for freeform and history, ensure that
  the affiliated tasks have a useful active time (based on the task
  they are affiliated with) for sorting
- Fix issue with the initial stack and focus state not taking the
  launch task into account due to the launchTask flag not being set
  until the activity was started (now set in RecentsTaskLoadPlan)
- Fixing issue with affiliated tasks not being launched from the stack
  due to the animation trigger not firing when the action button is
  already hidden/visible
- Fixing issue with title text being occasionally hidden (something we
  only need for freeform tasks)
- Tweaking the launch/enter animations for tasks occluded affiliated
  tasks

Bug: 26685208

Change-Id: I0f6e9dbf8deec2e4fc15364e686367cc0f57b41f