Remove logic that blocks surface update of system organized TF

This is a partial revert of ag/24271345. Now we have ag/25227916 merged
to allow RemoteTransition, we have a better mechanism to block unwanted
surface updates, so the original logic might not be needed any more.

Bug: 284050041
Test: atest TaskFragmentOrganizerControllerTest TaskFragmentTest WindowFlagsTest
Change-Id: I38d8d9c3099579dbe7b70b072f3b1b8f5fac00e4