Skip transferring the snapshot's starting data to the next activity

...if the snapshot is closed. This also implies that the snapshot's
activity was removed from the system server, and therefore the snapshot
starting window should not be used to another activity.

Flag: EXEMPT bugfix
Bug: 405000430
Test: simulate the slow creation of a starting window, and verify that
the snapshot data can be used to create another window after
transferring the starting window.

Change-Id: I9097cc3c55c83fe9a7ddf1f82472174ac47096e8