Do not use QAbstractItemModel::reset().

Change-Id: Ie49bdf576a6d3543aef6df133b27c8827775c935
Rationale:
    a) It is conceptually cleaner to do the changes to the model
       in between calls to beginResetModel() and endResetModel,
       respectively.
    b) The function is deprecated in Qt 5, for exactly that reason.
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/android/androidsettingswidget.cpp

@@ -51,8 +51,9 @@ namespace Internal {
 
 void AvdModel::setAvdList(const QVector<AndroidDeviceInfo> &list)
 {
+    beginResetModel();
     m_list = list;
-    reset();
+    endResetModel();
 }
 
 QString AvdModel::avdName(const QModelIndex &index)