Chats stay marked unread after picking up an incoming call

#### Describe the bug
The incoming call event stays marked unread after picking up an incoming call

#### To Reproduce
Steps to reproduce the behavior:
1. Pick up an incoming call.
2. End the call.
3. Make sure to not be in the chat view of the caller (on any client).
4. Notice 1 unread - which is for the incoming call and not for the hanging up event!

#### Expected behavior
Mark the incoming call event as read as soon as the call is picked up

#### Screenshots
Screen Cap:

https://chagai.website/incoming_call_notification_stays_unread_after_picking_up.mp4

#### Smartphone (please complete the following information):
- Device: Redmi Note 8 Pro
- OS: MIUI Global 12.0.4 (Android Version 10)

#### Additional context
- App version and store: 1.1.3 Google Play
- Homeserver: matrix.org

This also happens on many other devices.