Fix Handsfree NPE

Change-Id: Ib0176eddb9dbe41d7a8744a77bb356363cbb98f2
Fix: camera does not show up on secure lockscreen

Due that on secure lockscreen the startup order is
onCreate->onResume->onPause->onResume and all listeners
are already killed there is no need to kill the
voice listeners which will cause a pause when
the user try to access the camera from a secure
Lockscreen

cheers

Change-Id: I66c404620b5ee3397141dd71cd5e1211a3059853
Merge remote-tracking branch 'slim/jb4.2' into mirage