QmlProfiler: Methods for dispatching events by feature

When announcing features models have to provide functions that handle
events for those features now. The model manager gets a function to
dispatch events to the models that subscribe to them.

Change-Id: I3fd80443a68ba264a513d8d53ed473cf072f1dc7
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>

src/plugins/qmlprofiler/qmlprofilertimelinemodel.h

@@ -64,7 +64,7 @@ private slots:
     void onVisibleFeaturesChanged(quint64 features);
 
 protected:
-    void announceFeatures(quint64 features) const;
+    void announceFeatures(quint64 features);
 
 private:
     const Message m_message;