Drawer::dragMargin does not work on some Android devices

Setting dragMargin to 0 does not prevent drawer from being opened (which it should according to the documentation).

http://doc.qt.io/qt-5/qml-qtquick-controls2-drawer.html#dragMargin-prop
> This property holds the distance from the screen edge within which drag actions will open the drawer.
> Setting the value to 0 or less prevents opening the drawer by dragging.

Reproducible on Alcatel PIXI with Android 6.0