Jelly: Add elevation effect to searchBar

Some screenshots to show the difference
Before 1: http://i.imgur.com/eVFsFOZ.png
After 1: http://i.imgur.com/LCjkAXU.png
Before 2: http://i.imgur.com/l8RrTO0.png
After 2: http://i.imgur.com/PKLG6zH.png

Change-Id: I35ad7ccf0561dddc68eaecd3890fbe35d67c2560