open internal links for files app from any screen + open talk links inside the app

[mahibi]

Followup improvements to #3922

With this change, all links that target files in the same nextcloud instance will be opened in the files app, no matter on which screen the link was (e.g. useful when links are posted in conversation descriptions...).

• enhance this to also handle talk links inside the app itself
  • this solves Open Talk links in App #847 at least for links inside the app itself

How to test

• share some files url to chat & open
• share some talk url to chat & open

🏁 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?)

[sowjanyakch]

I shared a file URL to chat and opened the link. It redirects to the browser instead of the files app. Talk links work as expected.

[mahibi]

I shared a file URL to chat and opened the link. It redirects to the browser instead of the files app. Talk links work as expected.

currently only internal links with /f/ are supported.

the link that @sowjanyakch used was a public link with /s/
Like https://server.com/s/RdT8pPLj4SNq5qS

I'm not sure whats the best way to handle public links, but it won't be done with this PR

[github-actions]

Codacy

Lint

Type	master	PR
Warnings	81	81
Errors	119	119

SpotBugs

Category	Base	New
Bad practice	6	6
Correctness	11	11
Dodgy code	84	84
Internationalization	3	3
Malicious code vulnerability	3	3
Performance	6	6
Security	1	1
Total	114	114

[github-actions]

APK file: https://www.kaminsky.me/nc-dev/android-artifacts/3923-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.