utils/lib_video: make video_clean_and_refresh_v4l additive-only (never prune /dev/media)* - #319
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video_clean_and_refresh_v4l() now only triggers udev and recreates missing nodes from sysfs. Existing /dev/media* and /dev/video* entries are left untouched to avoid disrupting libcamera enumeration. Signed-off-by: Srikanth Muppandam <smuppand@qti.qualcomm.com>
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This PR updates video_clean_and_refresh_v4l() in Runner/utils/lib_video.sh to be additive-only: