blue: update hw key comment

Change-Id: I7aa9a6d33bf14980ede8c01e8e3575164653d3da
blue: update recovery graphics API

Change-Id: Ibf52e7051ecadbf9d88d535af8183b7402038358
blue: cleanup recovery stuff

remove also the use of camera key which will come useless (to be
honest i never seen why we needed it) with upcoming swipe gesture

Change-Id: Ic2bae9a16e9366ab2790443436435bf9e294a6bf