Exclude tasks manipulated before user setup is complete from Recents

We don't want any tasks manipulated before the user is done setting-up
their device included in the tasks list we give to the Recents activity.
However, the task can be included back in Recents if it is manipulated
after the user set-up is complete. E.g. you go into the gmail activity
during setup the task will be exclude, but if the user goes back into
gmail after setup then we start including the task.

Bug: 25959392
Change-Id: I421d48f0a9bcfc782d1ef19aa2f63e8b34a668e2