Audio is not recorded when I use headphone.

- [✔]I have read the [FAQ](https://github.com/Genymobile/scrcpy/blob/master/FAQ.md).
- [✔] I have searched in existing [issues](https://github.com/Genymobile/scrcpy/issues).

**Environment**
- OS: Windows
- scrcpy version: 2.0
- installation method: Windows release
- device model: Redmi K20 Pro
- Android version: 11

While recording the phone screen without using my headphone the recorded file includes both video and the audio. But while using 3.5mm headphone in my phone the recorded file includes only video, the audio is not captured while I use headphone with my phone.

No source file, test, or entry point is named. Start by reproducing screen recording on the Redmi K20 Pro with and without a 3.5mm headphone under Android 11, then trace the recording and audio-capture paths. Done means the recorded file contains audio in both configurations.

Written by the indexing model from the issue text.