Fix add and remove times for visual indicator

This task fixes two visual indicator bugs:
1. Currently, the visual indicator is added as soon as the task is dragged below the status bar. This change will make the DesktopTasksController wait for the task to be dragged below the status bar to draw the visual indicator.
2. Wait for the animation to grow or shrink a window during fullscreen and freeform transitions before removing so that the visual indicator does not disappear too early.

Bug: 276979555
Test: Manual Testing
Change-Id: Ib1c9a477feaa327f7a2430dd995b12b0bad255b4