Bluetooth latency during calls

[schaefferp]

• I have searched open and closed issues for duplicates
• I am submitting a bug report for existing functionality that does not work as intended
• I have read https://github.com/signalapp/Signal-Android/wiki/Submitting-useful-bug-reports
• This isn't a feature request or a discussion topic

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Bug description

During a Signal VoIP call, there is a noticeable lag in audio when using Bluetooth audio device (headphones, earphones)
Other VoIP applications appear to switch the Bluetooth connection to a low-latency mode, prioritizing delay over quality.

Steps to reproduce

• Connect a Bluetooth audio device
• Call someone on Signal

Actual result: Noticeable lag while speaking
Expected result: Low-latency audio

Screenshots

(no screenshots)

Device info

Device: Google Pixel 7 Pro
Android version: 14 / CalyxOS 5.5.2
Signal version: 7.1.3

Link to debug log

(no debug log)