Fix call button color and ensure call can always be declined from the notification

[bmarty]

Content

Use correct color for the incoming call screen buttons. Also improve the UI rendering in wide screen / landscape.

Ensure that the call can be declined from the notification. It was not working in some cases.

Motivation and context

Nicer UI, working notification action

Screenshots / GIFs

In landscape, the incoming call screen is less ugly

Before	After

Tests

• Make sure the phone is not locked, the screen is on.
• Receive an Element Call
• When the notification to accept/decline the call is displayed
• From the task switcher, kill Element X
• Attempt to decline the call from the notification.

If the call is declined and the notification is dismissed, the bug is fixed.

Tested devices

• Physical
• Emulator
• OS version(s):

Checklist

• Changes have been tested on an Android device or Android emulator with API 24
• 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 title will be used in the release note, it clearly define what will change for the user
• Pull request includes screenshots or videos if containing UI changes
• You've made a self review of your PR

[github-actions]

📱 Scan the QR code below to install the build (arm64 only) for this PR.

If you can't scan the QR code you can install the build via this link: https://i.diawi.com/vARin1

[jmartinesp]

God, it looked terrible in landscape. Now it's better, but it still feels weird, maybe we should ask design to enforce portrait mode here 😅 .

[jmartinesp]

Thanks!

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

❌ Patch coverage is 58.33333% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.41%. Comparing base (7d58464) to head (459e70f).
⚠️ Report is 18 commits behind head on develop.

Files with missing lines	Patch %	Lines
...all/impl/receivers/DeclineCallBroadcastReceiver.kt	0.00%	5 Missing ⚠️
...roid/features/call/impl/utils/ActiveCallManager.kt	71.42%	2 Missing and 2 partials ⚠️
...roid/features/call/impl/ui/IncomingCallActivity.kt	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #6195      +/-   ##
===========================================
- Coverage    81.41%   81.41%   -0.01%     
===========================================
  Files         2569     2569              
  Lines        69701    69712      +11     
  Branches      8942     8944       +2     
===========================================
+ Hits         56750    56754       +4     
- Misses        9630     9636       +6     
- Partials      3321     3322       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.