[escher] Move redraw method from App::didBecomeActive to

Container::switchTo

Change-Id: Ifa8bd2a37a754257d1f44d64b789f2efd25f96de

escher/src/app.cpp

@@ -109,7 +109,6 @@ void App::didBecomeActive(Window * window) {
   m_modalViewController.viewWillAppear();
   window->setContentView(view);
   setFirstResponder(&m_modalViewController);
-  window->redraw();
 }
 
 void App::willBecomeInactive() {

escher/src/container.cpp

@@ -27,6 +27,7 @@ void Container::switchTo(App::Snapshot * snapshot) {
   }
   if (m_activeApp) {
     m_activeApp->didBecomeActive(window());
+    window()->redraw();
   }
 }