[Autofill] Sync new wallet metadata fields through Chrome Sync.

components/sync/protocol/autofill_specifics.proto

Index: components/sync/protocol/autofill_specifics.proto
diff --git a/components/sync/protocol/autofill_specifics.proto b/components/sync/protocol/autofill_specifics.proto
index 9499a45fdaa1bb8ea07dea6f538b4e2cdbc4b209..4cf629cc896d2f878b676defff4816196198a21b 100644
--- a/components/sync/protocol/autofill_specifics.proto
+++ b/components/sync/protocol/autofill_specifics.proto
@@ -209,4 +209,11 @@ message WalletMetadataSpecifics {
   // The last use date of this Wallet card or address. Measured in microseconds
   // since the Windows epoch (1601).
   optional int64 use_date = 4;
+
+  // The id of the profile/address that represents the billing address of this
+  // Wallet card.
+  optional string card_billing_address_id = 5;
+
+  // Whether this Wallet address has been converted to a local autofill profile.
+  optional bool address_has_converted = 6;
 }