Merge "Expose SurfaceControl of TaskFragment to system organzier" into main

...java/android/window/ITaskFragmentOrganizerController.aidl

core/java/android/window/TaskFragmentOrganizer.java

core/java/android/window/TaskFragmentTransaction.java

...s/coretests/src/android/window/flags/WindowFlagsTest.java

services/core/java/com/android/server/wm/TaskFragment.java

...om/android/server/wm/TaskFragmentOrganizerController.java

...java/com/android/server/wm/WindowOrganizerController.java

...ndroid/server/wm/TaskFragmentOrganizerControllerTest.java

...s/wmtests/src/com/android/server/wm/TaskFragmentTest.java