[Presence] Deflag use_shared_credential_grpc and deprecate secret_id field from LocalCredential and SharedCredential protos

PiperOrigin-RevId: 586831590

internal/proto/credential.proto

@@ -47,7 +47,7 @@ enum CredentialType {
 // LINT.IfChange(SharedCredential)
 message SharedCredential {
   // The randomly generated unique id of the public credential.
-  bytes secret_id = 1;
+  bytes secret_id = 1 [deprecated = true];
 
   // 32 bytes of secure random bytes used to derive any symmetric keys needed.
   bytes key_seed = 2;

internal/proto/local_credential.proto

@@ -41,7 +41,7 @@ message LocalCredential {
 
   // The unique id of (and hashed based on) a pair of Secret Key and
   // X509Certificate's public key.
-  bytes secret_id = 1;
+  bytes secret_id = 1 [deprecated = true];
 
   // Bytes representation of an AES Key owned by local device, to encrypt
   // local device metadata.