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
Fixup
g2: add sec_config for irsc_util

Change-Id: I4fc5bd20f3a750731e003646c3f1d9f0f1a21f61