src/camera/bin/device_watcher/camera_device_watcher.cmx

{
    "program": {
        "binary": "bin/device_watcher"
    },
    "sandbox": {
        "dev": [
            "class/camera"
        ],
        "services": [
            "fuchsia.logger.LogSink",
            "fuchsia.sys.Environment",
            "fuchsia.sys.Launcher"
        ]
    }
}