Fix Lockscreen FC/reboot

PS2: register receiver in onResume()

Change-Id: If475f0750bbc408e727eb0d3cf532c936ad418e8
Signed-off-by: Gergely Szell (sethyx) <szell@hu.ibm.com>
fixed CalledFromWrongThreadException in observer update

Change-Id: I28f6ed06bfaf13bdcd00cd7da6d727caf8dc2337