tree 80b58c3b901a1b8d5646080c84a76fb5c7a52d5f
parent bddeea865c7965eabe4310565fc96023cca6da72
author Riddle Hsu <riddlehsu@google.com> 1537447034 +0800
committer Riddle Hsu <riddlehsu@google.com> 1538647872 +0800

Fix resuming with focusable always-on-top stacks

When a picture-in-picture menu activity (focusable always-on-top)
is active, the other stacks are always behind it. Then the top
focused is occupied and causes unable to resume the next activity
on another stack properly.

Now not only the z-order of stacks, but also consider the stack
that is preferred to be put at top to decide the focused stack.

Bug: 112084174
Test: atest ActivityDisplayTests
Test: atest ActivityStackSupervisorTests

Change-Id: I93c446f281001afd3c84a3862e31b4682919ab39