Flag CUJ_DEFAULT_TASK_TO_TASK_ANIMATION

Disables code added in commit 67075447
due to a tread handling issue with CUJ tracker that needs to be fixed
first.

Bug: 404190067
Bug: 407880967
Test: LaunchTaskTest
Flag: com.android.window.flags.transition_handler_cuj_tags
Change-Id: I6413ad1a4ac8ec88963b7cc4383d13e70c42697a