Digital Credentials API

[mariobodemann]

Prototype and add the DCAPI.

[mariobodemann]

Currently preparing a concept for the wwallet frontent to call a wrapper provided api to provide credentials.

[tladesignz]

Some references:
https://android-developers.googleblog.com/2025/04/announcing-android-support-of-digital-credentials.html
https://developer.android.com/identity/digital-credentials
https://digital-credentials.dev