a4d92a0152
When entering split-screen mode by long pressing the recents button, the top task in the fullscreen stack is moved to the docked stack and the new top task is the fullscreen stack is considered visible for a short amount of time until sys-ui launches the recents activity. This causes the new top activity in the fullscreen stack to be relaunched due to configuration change. To fix this sys-ui now sends an hint to activity manager to move the home stack forward so that it can be on-top of the fullscreen stack and makes it invisible before recent is launched and animated in. Bug: 28470261 Change-Id: Icfd85e932fe913dfb498752b5878cc7c690fd559