Smartspace - Animate vertically with clock change

When the large clock appears, move smartspace up to take the place of
the small clock. Reverse that when notifications appear and the small
clock shows up. Animate the large clock weight on appear.

Fixes: 185301988
Test: manual (swipe away notifications)

Change-Id: Ic293cebad4e7a5311c024a4d9cdc7b206689fde7