fix: set the default value of statusNotifierHost to true

Issue: linuxdeepin/developer-center#4431

由于dock在daemon检查时可能未启动，导致托盘协议回退。根据 @tsic404 的建议
，在确定一定会有支持SNI规范的应用(dde-dock)启动的情况下，取消该检查。

Signed-off-by: ComixHe <heyuming@deepin.org>

Author: ComixHe

misc/systemd/services/org.dde.session.Daemon1.service

@@ -17,3 +17,4 @@ BusName=org.deepin.dde.XEventMonitor1
 ExecStart=/usr/lib/deepin-daemon/dde-session-daemon
 Slice=app.slice
 Restart=on-failure
+NotifyAccess=main

trayicon1/status-notifier-watcher.go

@@ -48,6 +48,7 @@ func newStatusNotifierWatcher(service *dbusutil.Service,
 	snw := &StatusNotifierWatcher{
 		service: service,
 		sigLoop: sigLoop,
+		IsStatusNotifierHostRegistered: true,
 	}
 
 	sessionBus := service.Conn()
@@ -117,13 +118,11 @@ func (snw *StatusNotifierWatcher) RegisterStatusNotifierHost(serviceName string)
 	snw.PropsMu.Lock()
 	defer snw.PropsMu.Unlock()
 
-	if snw.IsStatusNotifierHostRegistered {
+	if snw.hostServiceName != "" {
 		return dbusutil.ToError(errors.New("host has been registered"))
 	}
 
-	snw.setPropIsStatusNotifierHostRegistered(true)
 	snw.hostServiceName = serviceName
-
 	err := snw.service.Emit(snw, "StatusNotifierHostRegistered")
 
 	return dbusutil.ToError(err)
@@ -139,7 +138,6 @@ func (ss *StatusNotifierWatcher) listenDBusNameOwnerChanged() {
 			if ss.hostServiceName == name {
 				logger.Infof("host %s lost", name)
 				ss.hostServiceName = ""
-				ss.setPropIsStatusNotifierHostRegistered(false)
 
 			} else if ss.watchedServices.Contains(name) {
 				logger.Infof("item %s lost", name)