Battery empty warning notification when bluetooth headphones are running out of battery

### Problem

The most annoying thing when having a meeting is joining and having your headphones turn off in the middle of the meeting.

### Proposal

Depending on the device used, it might not be possible to keep using them during charge. It would be nice if a notification with high importance is displayed to the user when the battery percentage drops below a user-chosen threshold for any of the currently connected bluetooth speakers / headphones like it is already done when the laptop battery is almost empty

### Prior Art (Optional)

_No response_