Android TV & Flutter Developer

We are looking for a developer to complete an existing Android and Flutter application for a healthcare technology platform. The project is well underway with solid foundations already built.
Core skills required:
Android native development in Kotlin is the primary requirement. The senior-side app is built in Kotlin and this is where the majority of remaining work sits.
Flutter and Dart for the caregiver-side app which is already built in Flutter.
Android TV development experience is essential. This is the specialist skill that matters most and the first question we will ask any applicant. If you have not built specifically for Android TV or set-top box devices, this role is not suitable.
Firebase — Realtime Database, Authentication, and Cloud Messaging.
Agora RTC SDK for video calling. Experience with Agora is preferred though strong candidates familiar with WebRTC will adapt quickly.
Background services, foreground services, alarm scheduling, and Android battery optimisation handling.
Android system-level development including device policy management and overlay windows.
OpenAI API integration — already partially implemented, requires extension.
Nice to have:
Experience with HDMI-CEC on Android devices.
Experience building kiosk or locked-down device applications.
Prior work in aged care, healthcare, or assistive technology.

Please answer the below question to see if you are a good fit.
In this project the senior app runs on a KA2 Android TV device and must automatically wake the television and switch the HDMI input when a call arrives, then return to the previous input when the call ends. The senior does nothing at any point.
Can you describe specifically how you would implement this using Android's HdmiControlManager API? Which classes and methods would you use to send the CEC commands, and how would you handle the case where the television manufacturer's CEC implementation is non-standard or partially compliant?