Quicksettings: Immersive: Fix collapse panel animation.

Right now it collapse after the ui goes into immersive mode so the collapse animation is not showed.
First collapse the panel then go into immersive mode so we see the animation.

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>

Change-Id: Icf2925fa517fc077929e02d1f96a8cd51163b809