tree ba5f6134cc1b71ad4647bd6b7e641c2c5f1ce7c3
parent 9e87abdcda1e378a6ac58562c4483bbb4e8d87ac
author Louis Chang <louischang@google.com> 1577956499 +0800
committer Louis Chang <louischang@google.com> 1578285463 +0800

Clean up the logic of selecting launching stack

- Consolidate the logic of get or create the launching stack.
- A launch stack was created and abandon (sometimes leaked)
  due to the created stack was not applicable. Now we return
  a valid launch stack where the activity can actually be landed.
- Defer resuming activity while brought the target stack to front.
- Remove some outdated code.

Bug: 139449647
Test: atest WmTests CtsWindowManagerDeviceTestCases
Change-Id: I2c07f8d5dfbc025b7a18f6c0307c361865a601f4