commit abd653a6a033ad78fedac40ab8dc52d968cc3ed0
author Jerry Chang <chenghsiuchang@google.com> Wed Oct 12 23:46:31 2022 +0000
committer Jerry Chang <chenghsiuchang@google.com> Wed Oct 26 04:54:52 2022 +0000
tree 47ba96b271220160e8d03d87952a6b7a2e612ae5
parent b0d018239d08e92f8c65b87885332211dfc210c2

Add fallback logic to cancel entering split screen

There are cases not having enough task changes to enter split screen.
Update to support canceling the enter-transition by reparenting tasks
back to display.

Fix: 237635859
Bug: 250853925
Test: atest WMShellFlickerTests
Test: enable shell transition and verify the following behaviors
      1. drag and drop Phone to enter split while Phone in front
      2. select "split right" on Phone icon and Phone thumbnail in
	 recents to enter split
Change-Id: I0fe8dfc0c46a8b1f5ee70d85359d2078c263ac80