[PiP on Desktop] Apply wct in Transition in close().

This is a follow-up to I3e17a0ac4c030fae0f3f0003218e1342334465a2 to
apply wct change in WindowDecoration#close() in a Transition as well.

Bug: 407880128
Test: atest WindowDecorationTests CaptionWindowDecorationTests
DesktopModeWindowDecorationTests
Flag: com.android.window.flags.enable_desktop_windowing_pip

Change-Id: Iad8214c14f8c6b4bc044e3cac2af32e46afed087