apply theming to user mentions

[sowjanyakch]

see comment https://github.com/nextcloud/talk-android/issues/4672#issuecomment-2673855819

🚧 TODO

• [ ] ...

🏁 Checklist

• [ ] ⛑️ Tests (unit and/or integration) are included or not needed
• [ ] 🔖 Capability is checked or not needed
• [ ] 🔙 Backport requests are created or not needed: /backport to stable-xx.x
• [ ] 📅 Milestone is set
• [ ] 🌸 PR title is meaningful (if it should be in the changelog: is it meaningful to users?)

[mahibi]

i think it crashed for me one time when entering the chat but did not find the crashlog..

[github-actions[bot]]

APK file: https://www.kaminsky.me/nc-dev/android-artifacts/4774-talk.apk



To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud Talk app.