bug#51341: gajim fails to start call

[rdes]

## Guix

  guix 6cd33f8

    repository URL: https://git.savannah.gnu.org/git/guix.git

    branch: master

    commit: 6cd33f855c88e63849c96d5df7ca256dd0379f4a

## Versions

- OS: Linux

- GTK Version: 3.24.24

- PyGObject Version: 3.34.0

- GLib Version : 2.62.6

- python-nbxmpp Version: 2.0.2

- Gajim Version: 1.3.2

## Traceback

```

Traceback (most recent call last):

  File "/gnu/store/w4svc0x3azr64ik8jhbirapidncn3cbb-gajim-1.3.2/lib/python3.8/site-packages/gajim/chat_control.py", line 719, in _on_call_with_mic

    self._on_jingle_button_toggled(['audio'])

  File "/gnu/store/w4svc0x3azr64ik8jhbirapidncn3cbb-gajim-1.3.2/lib/python3.8/site-packages/gajim/chat_control.py", line 954, in _on_jingle_button_toggled

    sid = con.get_module('Jingle').start_audio(

  File "/gnu/store/w4svc0x3azr64ik8jhbirapidncn3cbb-gajim-1.3.2/lib/python3.8/site-packages/gajim/common/modules/jingle.py", line 164, in start_audio

    jingle.add_content('voice', JingleAudio(jingle))

  File "/gnu/store/w4svc0x3azr64ik8jhbirapidncn3cbb-gajim-1.3.2/lib/python3.8/site-packages/gajim/common/jingle_rtp.py", line 359, in __init__

    self.setup_stream()

  File "/gnu/store/w4svc0x3azr64ik8jhbirapidncn3cbb-gajim-1.3.2/lib/python3.8/site-packages/gajim/common/jingle_rtp.py", line 374, in setup_stream

    JingleRTPContent.setup_stream(self, self._on_src_pad_added)

  File "/gnu/store/w4svc0x3azr64ik8jhbirapidncn3cbb-gajim-1.3.2/lib/python3.8/site-packages/gajim/common/jingle_rtp.py", line 116, in setup_stream

    self.p2pstream.set_transmitter_ht('nice', params)

gi.repository.GLib.GError: fs-error: Could not create the nicesrc element (1)

```

## Steps to reproduce the problem

...

start a chat -> open options and click 'start Call...' -> click 'With Microphone'