Call menu is not in sync with iOS's system calling UI

Checklist

• I am reporting an issue in existing functionality that does not work as intended
• I've searched for existing GitHub issues

Description

The iOS CallKit screen is not in sync with the Telegram overlay (speaker, mute). Enabling the speakers in Telegram does not enable them on the system UI and vice versa (btw, enabling the speakers on the system UI is weird as it does enable them but doesn't indicate it)

Expected Behavior

Speaker and mute buttons should be in sync on both screens (system and Telegram internal).

Actual Behavior

The buttons are not in sync. Enabling / disabling speakers and microphone is pretty weird.

Steps to Reproduce

Reproduction is very easy

1. Call someone with Telegram
2. Enable the speakers in the Telegram screen
3. Look into the system UI
4. Try clicking the speakers button on the system UI
5. Mute in the Telegram UI
6. Look into the system UI

Environment

Device: Tested on iPhone X, iPhone XS, iPhone 11, iPhone 6s

iOS version: 13.3

App version: 5.13.1

Reproduce the mismatch between Telegram's call overlay and the iOS CallKit screen using the listed call, speaker, and mute steps. Trace the existing call UI and CallKit integration first; done means speaker and microphone state changes are reflected consistently in both interfaces.