Revert "Keep z-order of tasks when merged into recents transition"

This reverts commit 5742d6b06221b7fcc71b20b52f732eb1d48f6f73.

Reason for revert: Messes up the order for restoration at end.

Change-Id: I391aa73da259652b4200040bcecb8fd1cf4a7106
1 file changed