Review Request: JDK-8226912: Color, Point2D and Point3D's fields should be made final

[Nir Lisker]

Hi Kevin,

Please review the simple fix for:
https://bugs.openjdk.java.net/browse/JDK-8226912
http://cr.openjdk.java.net/~nlisker/8226912/webrev.00/

I planned this for 14, but it can go into 13 too.

- Nir