Add snippets for configure and sign in sections. Also move some snipp…

[cy245]

Add snippets for configure and sign in sections. Also move some snippets to files where they can be validated.

[snippet-bot]

Here is the summary of changes.

You are about to add 13 region tags.

• identity/credentialmanager/src/main/AndroidManifest.xml:38, tag android_identity_assetlinks_manifest
• identity/credentialmanager/src/main/java/com/example/identity/credentialmanager/CredentialManagerFunctions.kt:41, tag android_identity_initialize_credman
• identity/credentialmanager/src/main/java/com/example/identity/credentialmanager/CredentialManagerFunctions.kt:62, tag android_identity_get_password_passkey_options
• identity/credentialmanager/src/main/java/com/example/identity/credentialmanager/CredentialManagerFunctions.kt:73, tag android_identity_get_credential_request
• identity/credentialmanager/src/main/java/com/example/identity/credentialmanager/CredentialManagerFunctions.kt:80, tag android_identity_prepare_get_credential
• identity/credentialmanager/src/main/java/com/example/identity/credentialmanager/CredentialManagerFunctions.kt:93, tag android_identity_launch_sign_in_flow_1
• identity/credentialmanager/src/main/java/com/example/identity/credentialmanager/CredentialManagerFunctions.kt:109, tag android_identity_handle_exceptions_no_credential
• identity/credentialmanager/src/main/java/com/example/identity/credentialmanager/CredentialManagerFunctions.kt:124, tag android_identity_launch_sign_in_flow_2
• identity/credentialmanager/src/main/jsonSnippets.json:22, tag android_identity_assetlinks_json
• identity/credentialmanager/src/main/jsonSnippets.json:42, tag android_identity_format_json_request_passkey
• identity/credentialmanager/src/main/jsonSnippets.json:52, tag android_identity_format_json_response_passkey
• identity/credentialmanager/src/main/res/layout-v34/xmlsnippets.xml:21, tag android_identity_textview_isCredential
• identity/credentialmanager/src/main/res/values/strings.xml:3, tag android_identity_assetlinks_app_association

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