core: Nest SDM Camera Sensors unable to be used with Homekit

The problem

The HomeKit integration has had support for camera motion sensors as well as doorbells through binary sensors. The Nest integration (through SDM) has just added support for motion sensors and doorbell in 1.0.0. The implementation of the Nest SDM sensors was instead through device events. Due to this there does not appear to be a way to implement these sensors with the camera in HomeKit.

Environment

• Home Assistant Core release with the issue: 1.0.0b0
• Last working Home Assistant Core release (if known): N/A
• Operating environment (OS/Container/Supervised/Core): HassOS 4.17/Supervisor 2020.12.2
• Integration causing this issue: homekit, nest
• Link to integration documentation on our website: https://rc.home-assistant.io/integrations/homekit/ https://rc.home-assistant.io/integrations/nest/

Problem-relevant configuration.yaml

N/A

Traceback/Error logs

N/A

Additional information

It was mentioned by @balloob in https://github.com/home-assistant/core/pull/42700#discussion_r517629879_ that “We should not show motion events as binary sensors.” If this is the case I would ask that HomeKit can be configured to let the device events be used in the configuration.