PUI & default-backend: add force argument to the control function of animation

PUI & default-backend: add force argument to the control function of animation

As we use pui_ani_control() to stop/pause an animation, it's impossible to check
whether the animation has been stopped from the user request or from the window
stack changes. Thus we add _pui_ani_control_with_force() to pass force value
when the animation must be paused from window stack changes.

Change-Id: Ied104d13cd463c37191d20515383501d4f8333a8
Signed-off-by: Sung-Jin Park <sj76.park@samsung.com>