refactor: Removed the PasskeyProvider and the PasskeyManager class

[pmathew92]

Changes

This PR removes the public PasskeyAuthProvider and the internal PasskeyManager classes used for Passkey signup and sign-in operations in favor of using the APIs directly from the AuthenticationAPIClient class.

References

#893

Checklist

• I have read the Auth0 general contribution guidelines

• I have read the Auth0 Code of Conduct

• All existing and new tests complete without errors

[Copilot]

Pull request overview

This PR removes the Passkey signup/sign-in wrapper types (PasskeyAuthProvider and internal PasskeyManager) and relies on AuthenticationAPIClient’s passkey APIs directly, including cleaning up related dependencies and Proguard configuration.

Changes:

• Removed PasskeyAuthProvider, PasskeyManager, and the associated unit tests.
• Dropped androidx.credentials dependencies and removed the Jetpack Proguard rules file.
• Updated the v4 migration guide to document the removal and point to AuthenticationAPIClient passkey APIs.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
sample/build.gradle	Removes Credential Manager dependencies from the sample app.
proguard/proguard-jetpack.pro	Deletes Jetpack/CredentialManager Proguard rules.
auth0/src/test/java/com/auth0/android/provider/PasskeyManagerTest.kt	Removes tests for the deleted internal PasskeyManager.
auth0/src/main/java/com/auth0/android/provider/PasskeyManager.kt	Deletes internal PasskeyManager implementation.
auth0/src/main/java/com/auth0/android/provider/PasskeyAuthProvider.kt	Deletes deprecated public PasskeyAuthProvider wrapper.
auth0/build.gradle	Removes consumer proguard include + credentials dependencies/version pin.
V4_MIGRATION_GUIDE.md	Documents PasskeyAuthProvider removal and points to new API usage.
AGP_UPGRADE_PLAN.md	Deletes upgrade planning document.

Comments suppressed due to low confidence (1)

proguard/proguard-jetpack.pro:1

• This file is being removed, but EXAMPLES.md still lists proguard-jetpack.pro as a recommended Proguard rules file. Please update the docs to stop referencing this file (or keep an equivalent consumer Proguard rules file) to avoid broken guidance/links for users.

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[Copilot]

The sample module still imports and uses androidx.credentials.* (e.g. sample/src/main/java/com/auth0/sample/DatabaseLoginFragment.kt uses CredentialManager, CreatePublicKeyCredentialRequest, etc.), so removing the androidx.credentials:credentials and credentials-play-services-auth dependencies here will break sample compilation. Either re-add these dependencies to the sample module, or remove/guard the passkey sample code that depends on Credential Manager.

Suggested change

	implementation 'androidx.navigation:navigation-ui-ktx:2.3.5'
	implementation 'androidx.navigation:navigation-ui-ktx:2.3.5'
	implementation 'androidx.credentials:credentials:1.2.2'
	implementation 'androidx.credentials:credentials-play-services-auth:1.2.2'