cli: set higher 3GPP Scan(), Register(), and Connect() method timeouts

Similar to voice call mmcli timeouts, set larger proxy-wide timeouts for
long-running operations. Match these timeouts with the internal ModemManager
timeouts for the AT/MBIM/QMI operation timeouts.

Fixes: https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/issues/941
Fixes: https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/issues/942

Signed-off-by: Dan Williams <dan@ioncontrol.co>

cli/mmcli-modem-simple.c

@@ -210,6 +210,9 @@ get_modem_ready (GObject      *source,
 
         g_debug ("Asynchronously connecting the modem...");
 
+        /* Setup operation timeout: 2 minutes (to match MM internal timeout) */
+        g_dbus_proxy_set_default_timeout (G_DBUS_PROXY (ctx->modem_simple), 2 * 60 * 1000);
+
         properties = mm_simple_connect_properties_new_from_string (connect_str, &error);
         if (!properties) {
             g_printerr ("Error parsing connect string: '%s'\n", error->message);