assy tests triggered by a uboot env variable

Recovery/board/funkey/rootfs-overlay/usr/local/sbin/brightness_get

@@ -9,7 +9,7 @@ if [ ${#} -ne 0 ]; then
 fi
 
 # Sanity check: Check if integer
-brightness=$(fw_printenv | grep brightness= | cut -d'=' -f 2-)
+brightness=$(fw_printenv -n brightness 2>/dev/null)
 if ! [ ! "${brightness}" -ne "${brightness}" ] 2> /dev/null; then
     brightness=${BRIGHTNESS_DEFAULT_VALUE}
 	fw_setenv brightness ${brightness}

Recovery/board/funkey/rootfs-overlay/usr/local/sbin/menu

@@ -227,9 +227,11 @@ menu_run () {
 	    if [ $? -eq 0 ]; then
 		if [ -e /mnt/.assembly_tests ]; then
 		    rm -f /mnt/.assembly_tests
+		    fw_setenv assembly_tests 0
 		    message=" FACTORY TESTS ENABLE"
 		else
-		    touch /mnt/.assembly_tests
+		    #touch /mnt/.assembly_tests
+		    fw_setenv assembly_tests 1
 		    message=" FACTORY TESTS DISABLE"
 		fi
 		notif "${message}"