Android 14/15 (targetSdk 35): one-way audio after answering incoming call — TVConnectionService starts a microphone Foreground Service from background, triggering SecurityException and muting uplink

[DucHM]

Issue Summary

When receiving an incoming call (Web → Android), the callee can hear the caller, but the caller cannot hear the callee (one-way audio). On Android 14/15 with targetSdkVersion 35, TVConnectionService attempts to start a foreground service with FOREGROUND_SERVICE_TYPE_MICROPHONE while the app is backgrounded. Android denies microphone-type FGS in this state, which leads to a SecurityException. As a result, uplink capture is blocked and the caller hears silence.

The service should use FOREGROUND_SERVICE_TYPE_PHONE_CALL (Telecom call) instead of MICROPHONE. Using MICROPHONE is both unnecessary (Telecom manages audio for the call) and disallowed from background on modern Android.

###Environment

Library: twilio_voice 0.3.2

Platform: Android (Flutter app)

targetSdkVersion: 35 (Android 15 / also reproducible on Android 14)

Call path: Caller (Web) → Callee (Android)

Callee accepts via the Telecom incoming call UI

Steps to Reproduce

1. Caller places a call from Web.
2. Callee receives incoming call on Android (Flutter, twilio_voice 0.3.2) and taps Accept.
3. Media connects: Callee hears Caller; Caller hears nothing.

Actual: One-way audio — callee hears caller; caller does not hear callee.

Expected: Two-way audio after call acceptance.

[Erchil66]

the package always guard check if microphone is enabled before proceeding to telecom maybe better to skip that process , To always focus in telecom only.