broadband-modem: reload registration info after manual registration

This refreshes operator information after manual registration. QMI and
MBIM implementations return operator info along with registration info
so they handle this easily, while with AT-based devices we must run
additional commands to retrieve that after the manual registration has
finished.

Suggested by: Kirill Buksha <kirill.buksha@axians.rs>
Fixes: https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/issues/971

Signed-off-by: Dan Williams <dan@ioncontrol.co>
(cherry picked from commit febab17f07)

src/mm-broadband-modem.c

@@ -5594,6 +5594,21 @@ modem_3gpp_run_registration_checks_finish (MMIfaceModem3gpp  *self,
     return g_task_propagate_boolean (G_TASK (res), error);
 }
 
+static void
+run_registration_checks_reload_current_registration_info_ready (MMIfaceModem3gpp *modem,
+                                                                GAsyncResult     *res,
+                                                                GTask            *task)
+{
+    GError *error = NULL;
+
+    mm_iface_modem_3gpp_reload_current_registration_info_finish (modem, res, &error);
+    if (error)
+        g_task_return_error (task, error);
+    else
+        g_task_return_boolean (task, TRUE);
+    g_object_unref (task);
+}
+
 static void run_registration_checks_context_step (GTask *task);
 
 static void
@@ -5835,13 +5850,17 @@ run_registration_checks_context_step (GTask *task)
             error = g_steal_pointer (&ctx->error_cs);
         else
             g_assert_not_reached ();
+
+        g_task_return_error (task, error);
+        g_object_unref (task);
+        return;
     }
 
-    if (error)
-        g_task_return_error (task, error);
-    else
-        g_task_return_boolean (task, TRUE);
-    g_object_unref (task);
+    /* When everything is done, recheck operator info as it may have changed */
+    mm_iface_modem_3gpp_reload_current_registration_info (
+        MM_IFACE_MODEM_3GPP (self),
+        (GAsyncReadyCallback)run_registration_checks_reload_current_registration_info_ready,
+        task);
 }
 
 static void