Direct2D QPA: Fix check for cosmetic pen

When checking whether a QPen should be treated as cosmetic we need to
take into account the render hints set on the painter as well.

Change-Id: I8200611af08000d2d1626d8ef97eb3f6dac4951c
Reviewed-by: Risto Avila <risto.avila@digia.com>
Reviewed-by: Andrew Knight <andrew.knight@digia.com>