The duration of animation means how long the animation is executed.
Therefore, if duration is 0, then the final state of animation should be
applied to the target object immediately.
In this case, if final_state_keep is true, then the final state of
animation is preserved. Otherwise, the final state of animation is not
preserved.
ref T8436, T8513
Reviewed-by: Marcel Hollerbach <mail@marcel-hollerbach.de>
Differential Revision: https://phab.enlightenment.org/D10812
Jaehyun Cho
cb817caa80