[mediaqueries-5] Privacy considerations.

It would be helpful to add a privacy considerations section to this spec, noting that some of the queries reveal interesting information about a user's preferences, which can be useful when building a fingerprint of the user's browser. Consider, for example, the hypothetical user who browses on their bathroom mirror, while inverting colors, preferring reduced motion and transparency, more contrast, and dark mode vs a perhaps more typical user who doesn't change any defaults at all.

Thanks!