BR: Radio buttons' state not announced in VoiceOver with only one button in the group

Possibly related to BR: VoiceOver not reading the state of toggle buttons (Big Sur)

Using VoiceOver on Monterey (12.5.1), the state of the button in a radio group is not announced when there’s only one button in the group.

To reproduce, run the AccessibilityDemo project using the latest develop branch, change RadioButtonsGroupComponent::numRadioButtons to 1. Navigate to the button with VoiceOver, toggle the button on/off.

Expected: The single radio button announces its state as “On” or “Off” as it is toggled.
Actual: The button only announces its name, with no indication of state.

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