Pekka Paalanen authored Sep 20, 2023 and Pekka Paalanen committed May 06, 2024

The headless backend does not display to anything, so it doesn't care
what the colorimetry mode is. To allow testing compositor internal
behavior, claim to support all colorimetry modes.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>