Allow TaskFragmentOrganizer to apply WCT without permission

TaskFragmentOrganizer will be used by regular apps without the
permission to manage Task. We are allow it to apply transactions if it
is operating on TaskFragment that is organized by itself.

Bug: 193191599
Test: atest WmTests:TaskFragmentOrganizerControllerTest
Change-Id: I82e5d49260680bd496ff184c6795ec817c65d858