OmniSwitch: new launcher icons

Credits to Adriano Loiacono
https://plus.google.com/u/0/+AdrianoLoiacono/posts/CtMKksg7hGB

Change-Id: I7675ed54beacf9919b8fdb1629deb556244fec62
OmniSwitch: simplify and cleanup

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

Change-Id: I39b6c1b00c589b81367722450ccb057769ebcb51

Conflicts:
	src/org/omnirom/omniswitch/SwitchService.java