Camera service: fix deadlock

release lock before return from CameraService::dump

Change-Id: I89d75f13bf82490929eafa1da9e88e7023abfb49
Orig-Change-Id: I7cedc834d13e180c9c9f43fe5ffb955f0a0c4755
Signed-off-by: Kalle Lampila <kallex.lampila@intel.com>
Signed-off-by: Jian Luo <jian.luo@intel.com>
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
Signed-off-by: Jack Ren <jack.ren@intel.com>
Author-tracking-BZ: 104720