DND override doesn't work for calls

**Describe the bug**
When DND (do not disturb) mode is enabled, calls don't make any sound even if `Call` notification channel is configured to override DND.

**To Reproduce**
Steps to reproduce the behavior:
1. Go to Settings - Notifications - Configure Call Notifications.
2. Enable Override Do Not Disturb.
3. Enable DND mode via android status bar.
4. Call to this device - there will be no sound.

**Expected behavior**
Call makes sound when DND is enabled and DND overriding is enabled.

**Screenshots**
If applicable, add screenshots to help explain your problem.

**Smartphone (please complete the following information):**
- Device: [OnePlus 6T]
- OS: [Android 10, Android 11]

**Additional context**
- App version and store [1.0.8 GooglePlay]
- Homeserver: [matrix.org]

DND overriding works perfectly with `Noisy` channel.