Notify of ringing call when there's an active call

[jmartinesp]

Type of change

• Feature
• Bugfix
• Technical
• Other :

Content

Makes sure the user is notified of a new call even when there is an active call though an 'incoming call' not ringing notification.

Motivation and context

I forgot this use case.

Tests

This can be difficult to test since you'll need 3 accounts.

• From account A call account B from a DM (it'll send a ringing notification).
• Quickly, from account C call account B too from a DM.
• An 'incoming call' notification should be displayed.

Tested devices

• Physical
• Emulator
• OS version(s): 14, 13.

Checklist

• Changes have been tested on an Android device or Android emulator with API 23
• UI change has been tested on both light and dark themes
• Accessibility has been taken into account. See https://github.com/element-hq/element-x-android/blob/develop/CONTRIBUTING.md#accessibility
• Pull request is based on the develop branch
• Pull request includes a new file under ./changelog.d. See https://github.com/element-hq/element-x-android/blob/develop/CONTRIBUTING.md#changelog
• Pull request includes screenshots or videos if containing UI changes
• Pull request includes a sign off
• You've made a self review of your PR

[github-actions]

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[codecov]

Codecov Report

Attention: Patch coverage is 91.54930% with 6 lines in your changes missing coverage. Please review.

Project coverage is 75.79%. Comparing base (30a1367) to head (8907672).

Files	Patch %	Lines
...ications/DefaultOnMissedCallNotificationHandler.kt	60.00%	0 Missing and 4 partials ⚠️
...mpl/notifications/CallNotificationEventResolver.kt	94.44%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #3003   +/-   ##
========================================
  Coverage    75.79%   75.79%           
========================================
  Files         1605     1608    +3     
  Lines        37983    38015   +32     
  Branches      7332     7337    +5     
========================================
+ Hits         28789    28814   +25     
  Misses        5354     5354           
- Partials      3840     3847    +7     

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[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud