Do not clip or rasterize paths completely outside the device rect

The controlPointRect is a conservative area that is guaranteed to
contain the path, if that does not intersect with the painter's device
rect, the path must be fully outside the painted area, and can be
ignored.

Change-Id: If14d7dbaf916aa284b941d01e773da3365dce5bf
Reviewed-by: Gunnar Sletta <gunnar@sletta.org>