Updated DragController logic to set touch event XY coordinates if there
is no view returned by the DropTarget. Added wait call for all drop
targets views removed to the
TaskbarActivityContext#onDragEndOrViewRemoved() method.
Bug: 411506181
Flag: com.android.wm.shell.enable_create_any_bubble
Test: build launcher
Change-Id: Ie97b08f22ae8dc34bd9f4e3738704e4fc90345bb