Let Divider use our theme color.

[bmarty]

Content

Let Divider use color and height from our theme.

Motivation and context

Limit usage of Material color
Help to provide a better fix instead of #7039

Screenshots / GIFs

See tiny diff in the recorded ones

Tests

• Small UI change

Tested devices

• Physical
• Emulator
• OS version(s):

Checklist

• I am aware of the etiquette.
• This PR was made with the help of AI:
  • Yes. In this case, please request a review by Copilot.
  • No.
• 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 defines 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

[jmartinesp]

Noice. Thank you!

[github-actions]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.60%. Comparing base (8ca1ce4) to head (d3f0a7e).
⚠️ Report is 11 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #7054   +/-   ##
========================================
  Coverage    80.60%   80.60%           
========================================
  Files         2681     2681           
  Lines        76283    76284    +1     
  Branches     10250    10250           
========================================
+ Hits         61486    61487    +1     
  Misses       10872    10872           
  Partials      3925     3925           

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