I have a Alexa Skill which works with a server side (based on https://github.com/alexa/alexa-skills-kit-sdk-for-java). I need to extend Alexa API, for example I would like to have an event like `onPromptPlayCompleted`.
If I understood correctly, Echo Dot devices which I use for testing the skill have firmware which based on https://github.com/alexa/avs-device-sdk. So looks like I can add to firmware custom functionality which should be follow my requirements.
There is a question: - How can I install my custom firmware which based on https://github.com/alexa/avs-device-sdk into my echo dot devices via the skill?