note QFileDialog::setNameFilters() is not supported on Android

Task-number: QTBUG-83089
Change-Id: I134917476548f9756a14975be6b1b20312a8ca40
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

src/widgets/dialogs/qfiledialog.cpp

@@ -1370,6 +1370,9 @@ QStringList qt_make_filter_list(const QString &filter)
 
     \snippet code/src_gui_dialogs_qfiledialog.cpp 6
 
+    \note This is not supported on Android's native file dialog. Use
+        \l{setMimeTypeFilters()} instead.
+
     \sa setMimeTypeFilters(), setNameFilters()
 */
 void QFileDialog::setNameFilter(const QString &filter)
@@ -1441,6 +1444,9 @@ QStringList qt_strip_filters(const QStringList &filters)
     filters for each file type. For example, JPEG images have three possible
     extensions; if your application can open such files, selecting the
     \c image/jpeg mime type as a filter will allow you to open all of them.
+
+    \note This is not supported on Android's native file dialog. Use
+        \l{setMimeTypeFilters()} instead.
 */
 void QFileDialog::setNameFilters(const QStringList &filters)
 {