Audio routing to bluetooth headset with setAudioRoute doesn't work on OnePlus devices

Bug report

• I've checked the example to reproduce the issue.

• Reproduced on:

• Android

• iOS

Description

Hi,
I've been working on a voice call app for 2 years now. I received a bug report from one of our testers which setAudioRoute doesn't work on OnePlus devices for bluetooth routing. Then I tested and observed that it indeed doesn't work. Routing to speaker and earpiece works perfect though. Only for bluetooth.
I've been struggling this issue for a month now. No visible indication, error or debug log. Nothing. It just doesn't turn on bluetooth headset. I tried different headsets and none of them worked.
This functionality works just fine on other brands as far as I tested. Did anyone face this issue before ?

Steps to Reproduce

• Start a call/answer a call
• Try to route audio to bluetooth headset with setAudioRoute

Versions

- Callkeep: 4.3.3
- React Native: 0.69.5
- iOS: N/A
- Android: 12
- Phone model: OnePlus Nord 2T

Logs

No logs available

Start with the example linked in the issue and reproduce setAudioRoute on Android 12 using a OnePlus Nord 2T and Bluetooth headset. Compare the Bluetooth path with the working speaker and earpiece routes; done means Bluetooth routing succeeds on the reported device and the behavior is covered by useful diagnostics or a regression test.