base

Show non-top tasks in the docked stack in recents.

Allows the user to access the task through recents since
it isn't currently visible on screen.

Also, changed recents to launch task currently in the docked
stack in the fullscreen stack when selected from recents list.

Bug: 27864383
Change-Id: I58549023920d064a30b6355367c3193ce3207bbd