Send PictureInPictureParamsChange to the task requesting it

PictureInPictureParams change should be notified to the task which
requests it. It's especially important if the task is nested in another
task (e.g. a desk in desktop windowing).

Bug: 422654539
Test: atest MinimizeAutoPipAppWindowTest
Test: atest ActivityRecordTests
Flag: com.android.window.flags.enable_pip_params_update_notification_bugfix
Change-Id: I7d7f7c3e12d2109390112de315e1f55be089ec1b