tree ff801a0a375543649fe3cac3dfbe82329720455e
parent 41308eced121d8b2b7e78d08edc8e0d4e9e43661
author Bogyun Son <bogyun.son@samsung.com> 1575881424 +0900
committer Vishnu Nair <vishnun@google.com> 1581645378 -0800

[wm] Add APIs to notify task focused & task focus lost

- Let listeners know which task is going to front or back.

 onTaskFocusChanged(taskId, focused)
- calls when the task gets or loses focus.

Test: atest ActivityStackSupervisorTest#testNotifyTaskFocusChanged
Bug: 129951708
Change-Id: I92bfdb760f4c5f1db00334f4eff41fe52115b942