Open Source licenses: add color for links.

[bmarty]

Content

Complement for #3207: specify color for links in the theme.

Motivation and context

Nicer colors

Screenshots / GIFs

Before	After

Tests

• Step 1
• Step 2
• Step ...

Tested devices

• Physical
• Emulator
• OS version(s):

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 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
• Pull request includes a sign off
• You've made a self review of your PR

[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.14%. Comparing base (0d41788) to head (dcafac0).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #3215   +/-   ##
========================================
  Coverage    76.14%   76.14%           
========================================
  Files         1645     1645           
  Lines        38809    38809           
  Branches      7516     7516           
========================================
  Hits         29552    29552           
  Misses        5356     5356           
  Partials      3901     3901           

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[bmarty]

@jmartinesp I have added another commit to avoid code duplication. I have not seen any regression during my test.

[sonarcloud]

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 SonarCloud

[jmartinesp]

Looks ok to me too.