DeskClock: flip to snooze/dismiss alarm

http://jira.omnirom.org/browse/OMNI-323

Flip SensorEventListener from CM - thanks

TODO: google is not following its own guidelines and has
added the array for the alarm actions into string.xml
Clean that up at some point

PS2
whitespaces

Change-Id: Ie95fa46b36f7a4589371c68e277fe5e453e0bb7b