There are two partial implementations of the color-manager
protocol boilerplate, in color-management-test.c and
color-management-parametric-test.c. This patch moves the implementation
from the latter into the client library, and uses the helper bit().
This paves way for moving the other partial implementation as well,
de-duplicating the overlapping code, and allowing new test programs to
poke at color-manager.
The color-manager is initialized on-demand, because mosts tests in the
suite do not need it. This avoids a little of unnecessary work.
In anticipation of wp_color_management_v1 version 2, the interface
version is explicit and ensured.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
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