StatusUpdate::PresenceRequired signals to the application that it's time to show a "Touch your security key" prompt. Previously, in Firefox, we showed those prompts upon receiving StatusUpdate::DeviceSelected(..), which would sometimes cause the "Touch your security key" prompt to be shown briefly before being overridden by a PIN/UV prompt.
StatusUpdate::PresenceRequiredsignals to the application that it's time to show a "Touch your security key" prompt. Previously, in Firefox, we showed those prompts upon receivingStatusUpdate::DeviceSelected(..), which would sometimes cause the "Touch your security key" prompt to be shown briefly before being overridden by a PIN/UV prompt.