Subsonic - getUser.view request wrongly formatted

Steps to reproduce

1. Use Funkwhale via Ultrasonic on Android
2. Shuffle all Songs
3. No playlist is created
4. Logs show Subsonic-Request getUser.view

What happens?

No shuffled playlist is generated. According to the Ultrasonic-Devs, the subsonic response from the getUser.view request is wrongly formatted.

Current response has format:

{
  ...
  "user": {
    ...
    "folder": [{
      "value": 1
    }]
  }
}

Correct format should be:

{
  ...
  "user": {
    ...
    "folder": [
      "1",
      "x", ...
    ]
  }
}

This has only happened in more recent versions of Funkwhale. I had used this successfully in previous versions (0.21.0 iirc).

What is expected?

Funkwhale responds with correctly formatted subsonic responses and a shuffled playlist can be generated.

Context

Funkwhale version(s) affected: 1.0, 1.1

I had this issue previously opened on the Ultrasonic-Github.

Related issue is here: https://github.com/ultrasonic/ultrasonic/issues/381