[PATCH 3/7] service: Refactor 'connman_service_set_proxy_method'.

There are currently two places where the network service proxy method
is set:

  1. connman_service_set_proxy_method
  2. __connman_service_set_proxy_autoconfig

Prior to this change, each did a similar, but bespoke set of
operations to set the network service proxy method.

Leverage 'service_set_proxy_method', which embodies the
previously-similar, bespoke operations, for
'connman_service_set_proxy_method', the first of the above two call
sites.
---
 src/service.c | 18 ++++++------------
 1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/src/service.c b/src/service.c
index db6ec26240fd..6fff20d4de96 100644
--- a/src/service.c
+++ b/src/service.c
@@ -5618,19 +5618,13 @@ static void service_set_proxy_method(struct connman_service *service,
 void connman_service_set_proxy_method(struct connman_service *service,
 					enum connman_service_proxy_method method)
 {
-	DBG("service %p (%s) method %d (%s)",
-		service, connman_service_get_identifier(service),
-		method, proxymethod2string(method));
-
-	if (!service || service->hidden)
-		return;
-
-	service->proxy = method;
-
-	proxy_changed(service);
+	const bool donotifier = method != CONNMAN_SERVICE_PROXY_METHOD_AUTO;
 
-	if (method != CONNMAN_SERVICE_PROXY_METHOD_AUTO)
-		__connman_notifier_proxy_changed(service);
+	service_set_proxy_method(service,
+		method,
+		donotifier,
+		NULL,
+		NULL);
 }
 
 enum connman_service_proxy_method connman_service_get_proxy_method(
-- 
2.45.0