Biometric

1. Show a biometric authentication dialog

   BiometricPrompt, authenticators and prompt info.

2. Biometric sign-in guide

   Legacy biometric sign-in guide covering strong vs weak authenticators.

3. Security and data guidance

   Protecting data with keys that require user authentication.

4. Biometric Android Keystore integration

   Keys bound to biometric authentication in the keystore.

5. Release notes

   Biometric artifact versions.

Each section links to the official page. Titles and summaries by Extra Credit; the docs belong to their authors.