[FR] Add support for Wake Words in Companion app/on Android devices

**Is your feature request related to a problem? Please describe.**

When an Android phone or tablet is not reachable but is within hearing range, text commands cannot be sent to the assistant, but using Wake Words, it would be possible to send commands even without physicially accessing the devices.

**Describe the solution you'd like**

Implement support for wake words, e.g. using OpenWakeWords.

**Describe alternatives you've considered, if any**

None available

**Additional context**

Maybe, but this would need to be tested, this feature would even allow Android TV devices to act as control centers using voices (since the UI does not fully work on Android TV or rather, it is extremly difficult to navigate without a mouse).