Android: Add simple creation and attestation of a credential

[mariobodemann]

This is to smoothen the entry into the world of credentials: First create a simple one and then use extensions ...

[Copilot]

Pull request overview

Adds a new Android quickstart “track” that demonstrates creating a basic WebAuthn credential and then performing an assertion, to make credential onboarding easier within the existing track-based sample app.

Changes:

• Introduces a new CredentialTrackViewModel to run makeCredential + getAssertion and expose results to UI state.
• Adds a new Compose UI (CredentialTrackView) to display the created options/responses.
• Wires the new track into the track selector/navigation and adds a new string resource for the track title.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
quickstart/android/app/src/main/res/values/strings.xml	Adds a new track title string for the credential creation track.
quickstart/android/app/src/main/java/com/yubico/eap/quickstart/track/credentials/CredentialTrackViewModel.kt	Implements credential creation + assertion flow and exposes results via Compose state.
quickstart/android/app/src/main/java/com/yubico/eap/quickstart/track/credentials/CredentialTrackView.kt	Adds UI to render the credential flow results and handle in-progress/error states.
quickstart/android/app/src/main/java/com/yubico/eap/quickstart/QuickstartVM.kt	Registers the new track and shifts track indices accordingly.
quickstart/android/app/src/main/java/com/yubico/eap/quickstart/MainActivity.kt	Adds the new track to the selection list and routes to its view/model.

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