Added snippets for verified email feature via Credential Manager API

[niharika2810]

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[snippet-bot]

Here is the summary of changes.

You are about to add 5 region tags.

• identity/credentialmanager/src/main/java/com/example/identity/credentialmanager/VerifiedEmailFunctions.kt:50, tag android_identity_get_verified_user_info_request
• identity/credentialmanager/src/main/java/com/example/identity/credentialmanager/VerifiedEmailFunctions.kt:93, tag android_identity_get_verified_user_info_response
• identity/credentialmanager/src/main/java/com/example/identity/credentialmanager/VerifiedEmailFunctions.kt:146, tag android_identity_parse_response
• identity/credentialmanager/src/main/java/com/example/identity/credentialmanager/VerifiedEmailFunctions.kt:178, tag android_identity_create_account_verified_email_client
• identity/credentialmanager/src/main/java/com/example/identity/credentialmanager/VerifiedEmailFunctions.kt:200, tag android_identity_response_and_claims_example

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[gemini-code-assist]

Code Review

This pull request introduces a new utility class, VerifiedEmailFunctions, to handle interactions with the Credential Manager for verified email credentials. It includes functions for constructing OpenID4VP requests, extracting verified user information from SD-JWTs, and creating accounts with verified emails. The review suggests defining a TAG constant for logging and refactoring duplicated SD-JWT parsing logic into a shared helper function to improve maintainability and robustness.