commit 2f6e174c4afb2e2d171808033df7ad4133854e53
author Riddle Hsu <riddlehsu@google.com> Thu Aug 23 22:44:36 2018 +0800
committer Riddle Hsu <riddlehsu@google.com> Fri Sep 14 12:58:00 2018 +0800
tree 4bbd87e4147618b3f68b44aee2904a7f167d9e05
parent 3bbff814edf69e5c80ee10a24048a39bfec12385

Fix z-order of displays when adjusting position of stack

When moving a stack to top including its parent (display),
if the target position is adjusted to non-top because there
is other always-on-top stack in this container, the display
should also be moved to top for higher focus priority.

Z-order
Top          |----------------|
   Display 1 | [Normal stack] |
             |----------------|

             |----------------|
   Display 0 | [Pinned stack] |
             | [Normal stack] | <- Moving task in here
Bottom       |----------------|

Bug: 113099160
Test: atest TaskStackContainersTests#testDisplayPositionWithPinnedStack
Change-Id: I877fd2acddeeb6d68fe6f4336dd202b9db11d94e