[permissions-policy] Accessibility concerns

The Accessible Platform Architetures (APA) working group has reviewed the latest working draft of the Permissions policy specification (https://w3c.github.io/webappsec-permissions-policy/) and we have some concerns.
We are concerned that users, to assure their full, barrier-free access to a site, may rely on some of the features (https://github.com/w3c/webappsec-permissions-policy/blob/main/features.md) controlled via these policies. For example, a user with vision limitations may rely upon access to an ambient-light-sensor to normalize brightness or contrast. Or a user may rely upon various media capture features necessary for proper functioning of assistive technology and/or their necessary adaptations.

Have you taken that this into consideration when drafting this specification?

(Normally I would file an issue in your github respository and label it with a11y-needs-resolution but your spec requested feedback via this mechanism.) 


Becky Gibson
https://www.linkedin.com/in/beckygibsona11y/

The World Wide Web Consortium (W3C), Web Accessibility Initiative (WAI)
Co-Chair, Accessible Platform Architectures	http://www.w3.org/wai/apa