Reduce unnecessary operations in the setFocusedTask

- Eliminate an extra transition request when swipe-up gesture is
  active from RecentsTransitionHandler.RecentsController
  #setInputConsumerEnabled -> setFocusedTask. The invocation only
  needs to set focus without moving the task.
- Skip notifying unchanged state in
  setLastResumedActivityUncheckLocked.

Bug: 275508603
Test: CtsActivityManagerDeviceTestCases
Change-Id: I7560f98ade59f7e68de07e3cd027adafbc509598