OmniSwitch: UI tweaks

-added shadow effect on labels
-added shadow effect on buttons
-make sure all buttons get reset to the default images
-move enable switch into action bar
-check for enabled in start om boot sequence
-rambar padding and cleanup

Change-Id: I7b516780bb755f7aac3b8916b894e7af5e60f104
Merge "OmniSwitch: UI tweaks" into android-4.4