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
OmniSwitch: simplify and cleanup

-use start on boot as default for enable
-remove unneeded broadcasts

Change-Id: I39b6c1b00c589b81367722450ccb057769ebcb51