- Mark the chooser activity as never launching in to a new
task, even if the caller asks for it. These are dialogs
so don't make sense as stand-alone tasks. (Maybe later
the policy should be to not launch into a new task in any
case that the activity is a dialog or even transparent at all.)
- Keep track in the task record of whether any activities in
it have been shown to the user, and use this to automatically
remove the task when all activities finish. This leans up
cases where apps are launching stub activities that get turned
in to tasks but are never seen by the user because they
immediately launch another activity in another task and
then finish.
Change-Id: I00b641c80aa96bd5071479f36ee2e4d8e3a81aeb
d38aed8142