Always clean up taskview

When creating a TaskViewTaskController, it registers itself in
TaskViewTransitions in the constructor.
This means, even if the task is not initialized, we still need to clean
up the TaskViewTaskController.

Ignoring that task id is not present and always calling the removeTask
method in BubbleTaskView.
Updating TaskViewTaskController removeTask method to always remove the
class from TaskViewTransitions. Even if the task itself is not
initialized.

Bug: 369995920
Flag: com.android.wm.shell.enable_task_view_controller_cleanup
Test: atest BubbleTaskViewTest
Change-Id: Ie4766452c30a497a7a447c7473a85be1ddc45b0e