feat: watch systemd unit new and remove to sync state

add default values to XDG_DATA_DIRS if it dosen't set

Signed-off-by: ComixHe <heyuming@deepin.org>
Signed-off-by: black-desk <me@black-desk.cn>

src/dbus/applicationmanager1service.h

@@ -60,6 +60,8 @@ private:
     std::unique_ptr<Identifier> m_identifier;
     QScopedPointer<JobManager1Service> m_jobManager{nullptr};
     QMap<QDBusObjectPath, QSharedPointer<ApplicationService>> m_applicationList;
+
+    QPair<QString, QString> processServiceName(const QString &serviceName);
 };
 
 #endif