hammerhead: init: Do not use mpdecision, use simple_plug instead

Change-Id: I92a6c93a2a5cb034b33b582416696c282fdfcd2b
hammerhead: init: Reconfigure interactive governor

Change-Id: Ie4765731200a1cc9a661920e4a5bb8702f9cf00d
init.hammerhead: Add back mpdecision service
init.hammerhead: Make cpu-boost less aggressive