fix bug on screen grabber management (#554)

Signed-off-by: Denis barbaron <denis.barbaron@orange.com>

lib/cli/provider/index.js

@@ -1,3 +1,7 @@
+/**
+* Copyright © 2022 contains code contributed by Orange SA, authors: Denis Barbaron - Licensed under the Apache license 2.0
+**/
+
 module.exports.command = 'provider [serial..]'
 
 module.exports.describe = 'Start a provider unit.'
@@ -195,6 +199,7 @@ module.exports.handler = function(argv) {
       , '--adb-host', argv.adbHost
       , '--adb-port', argv.adbPort
       , '--screen-jpeg-quality', argv.screenJpegQuality
+      , '--screen-grabber', argv.screenGrabber
       , '--screen-ping-interval', argv.screenPingInterval
       , '--screen-ws-url-pattern', argv.screenWsUrlPattern
       , '--connect-url-pattern', argv.connectUrlPattern