Pass the captured snapshot data to Launcher when recents animation is

cancelled.

In the current implementation, when recents animation is cancelled due
to stack order change, window manager replaces the surface with a
snapshot before cancellation. Launcher needs to acquire the snapshot in
order to switch the live tile into snapshot mode, and yet because the
recents animation is cancelled, that snapshot can no longer be acquired
anymore. This change takes care of this "relay" process.

Fixes: 138683199
Test: N/A
Change-Id: I1c11af38c2bdc442e3b45d0b5f0c7e7e37c2b0f0