xcb/apps: move to my devices alongside other capture services

(cherry picked from commit 2261dcb956190cae2a0fea309c32323ad68315ab)

modules/services_discovery/xcb_apps.c

@@ -81,7 +81,7 @@ static int vlc_sd_probe_Open (vlc_object_t *obj)
         return VLC_PROBE_CONTINUE;
     xcb_disconnect (conn);
     return vlc_sd_probe_Add (probe, "xcb_apps{longname=\"Screen capture\"}",
-                             N_("Screen capture"), SD_CAT_MYCOMPUTER);
+                             N_("Screen capture"), SD_CAT_DEVICES);
 }
 
 /**