OmniSwitch: update action icons

-use home and back from lp
-rework kill icons
-disable immersive for now
-replace glow selector with material ripple effect
-changed holo blue light to material light to match LP theme

Change-Id: I34cfc3d7e294e21568b356df32cbde5975ddfdc5
Merge "OmniSwitch: update action icons" into lollipop