[FEATURE REQUEST] Modify IDP Callback, redirect URI to use dynamic domain, instead of hardcoded opencloud.eu domain

[IZL-01]

Is your feature request related to a problem? Please describe.
With privacy in mind, I'm using an external IDP (keycloak) - when wanting to connect using the mobile android app - the callback uri "oc://android.opencloud.eu" is hardcoded.

Describe the solution you'd like
I would like the IDP callback URI to be dynamic - so when using opencloud hosted instance "https://opencloud.customdomain.com" , the callback is similar to the web uri callback generation:
"redirectUris": [
"https://opencloud.customdomain.com/index.php/apps/user_oidc/code",
"https://opencloud.customdomain.com/*",
"https://opencloud.customdomain.com/oidc-callback.html",
"https://opencloud.customdomain.com/apps/user_oidc/code"
]

Describe alternatives you've considered
The idea is that the external IDP shouldn't have to rely on an external domain uri.

Additional context
A equivalent feature request has been posted for the IOS mobile app.

TASKS

• Research (if needed)
• Create branch feature/feature_name
• Development tasks
  • Implement whatever
  • ...
• Code review and apply changes requested
• Design test plan
• QA
• Merge branch feature/feature_name into main

PR

• App
• Library (if needed)

[guruz]

This is defined in. https://github.com/opencloud-eu/android/blob/main/opencloudApp/src/main/res/values/setup.xml#L89