Add control for set Android manifest screenOrientation param

Android manifest have a param called screenOrientation for
instruct Android to show the app in landscape mode, portrait
mode and so on. This patch add a control allowing to set
the preferred one by selecting from the list of all currently
availables.

Change-Id: Id53dd8aa1efaa603bc30b02c8a5a8db55e97e75b
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

src/plugins/android/androidmanifesteditorwidget.h

@@ -181,6 +181,7 @@ private:
     QLineEdit *m_activityNameLineEdit;
     QComboBox *m_targetLineEdit;
     QComboBox *m_styleExtractMethod;
+    QComboBox *m_screenOrientation;
     AndroidManifestEditorIconContainerWidget *m_iconButtons;
     SplashIconContainerWidget *m_splashButtons;