Direct2D QPA: Add handlers for individual primitives

Directly handling primitives is faster than using the catch-all fill
function which converts arbitrary paths into a direct2d geometry. So do
so.

Change-Id: I71ce73dbe75aa9b61e741c358d8787d0ea48ee46
Reviewed-by: Risto Avila <risto.avila@digia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Andrew Knight <andrew.knight@digia.com>