Notify organizer about TaskFragment parent windowing mode change

1. When the Task windowing mode changes, notify the organizer.
2. When organizer requests windowing mode change, record the last
   request value to avoid unnecessary IPC call.

Bug: 230446204
Test: atest WmTests:TaskFragmentOrganizerControllerTest
Test: atest WMJetpackUnitTests:SplitPresenterTest
Change-Id: I30c5dbf7b70d085647490943508bd5d22fda3ead