camera: Restart preview after ZSL changes only if the preview is running

Don't touch the preview state if it was stopped to begin with

Change-Id: Ie81c01165778f98f92f11badc17c2023ea4610b7

Conflicts:

	camera/CameraWrapper.cpp
__X-treme_D-vice__
update relese tools now that we've updated build to accomodate recovery-cm