Set shortcuts back to original position after shaking

Due to the nature of the "shake" animation, the shortcuts were ending up
a few pixels to the left from their original location after the
animation ended.

Additionally update the horizontal position of the shortcuts, per design
spec change to align them with notifications.

Fixes: 301079105
Fixes: 298964750
Test: manual - turn show layout bounds on. Tap shortcut to initiate shake, observe that the shortcut goes back to its original position after shaking
Test: manual - notice that the shortcuts are moved outwards as expected
Change-Id: I493ed2f6744d06ab3abc9bd992edfd1c73ec85a6