Color manager cleanups
This is a series of mundane clean-ups to color-lcms and around:
- mechanical renames of functions
- move the call of
weston_compositor_enable_color_management_protocol()
into the core - improve asserts with
weston_assert_bit_is_set()
- cosmetic code motion
Very boring stuff, but it did make me re-check that the references to color profiles are taken where they should.
cc @leandrohrb