Add restore credential snippets

[neelanshsahai]

No description provided.

[snippet-bot]

Here is the summary of changes.

You are about to add 3 region tags.

• identity/credentialmanager/src/main/java/com/example/identity/credentialmanager/RestoreCredentialsFunctions.kt:34, tag android_identity_restore_cred_create
• identity/credentialmanager/src/main/java/com/example/identity/credentialmanager/RestoreCredentialsFunctions.kt:46, tag android_identity_restore_cred_get
• identity/credentialmanager/src/main/java/com/example/identity/credentialmanager/RestoreCredentialsFunctions.kt:62, tag android_identity_restore_cred_delete

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[cy245]

Please add license or run spotless to add it here

[neelanshsahai]

I dont think spotless is configured for this project. Should I add spotless configuration in this PR as well?