GeezerVison

What

DoorbellService now adds the optional Mute characteristic (11A) when the accessory implements AccessoryWithMute, like it already does for Name, Brightness and Volume. It also gets an addOptionalCharacteristic(MuteCharacteristic) overload.

Why

Mute is an optional characteristic of the Doorbell service (see the HAP-NodeJS Doorbell definition). The 2.0.1 changelog says "Add Mute characteristic to Doorbell service", but commit 40e0338 wired Mute into DoorService instead, and DoorbellService never got it.

Compatibility

Purely additive. Doorbells that don't implement AccessoryWithMute are unchanged.

DoorService keeps its Mute support: removing it would drop a public method, and nothing requires the change.

Testing

mvn -B package on JDK 11: all 23 tests pass. The new DoorbellServiceTest covers:

• a doorbell without optional characteristics still exposes only the switch event
• with AccessoryWithMute, the Mute characteristic is added, reports the accessory's state and forwards writes to setMute

Note: like #207, #209 and #210, this adds a # HAP-Java 2.0.10 section to CHANGES.md.