[Autofill Auth] Updating PaymentsClient JSON field name.

Changing "fido_eligible_credit_card_id" to "fido_eligible_card_id" to match
server field names.

Bug: 949269
Change-Id: I932fd907cd18dd5377e1e0b278cec0b936a6c25b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1891769Reviewed-by: Jared Saul <jsaul@google.com>
Commit-Queue: Manas Verma <manasverma@google.com>
Cr-Commit-Position: refs/heads/master@{#711136}

components/autofill/core/browser/payments/payments_client.cc

@@ -295,7 +295,7 @@ class GetUnmaskDetailsRequest : public PaymentsRequest {
       unmask_details_.fido_request_options = dictionary_value->Clone();
 
     const auto* fido_eligible_card_ids = response.FindKeyOfType(
-        "fido_eligible_credit_card_id", base::Value::Type::LIST);
+        "fido_eligible_card_id", base::Value::Type::LIST);
     if (fido_eligible_card_ids) {
       for (const base::Value& result : fido_eligible_card_ids->GetList()) {
         unmask_details_.fido_eligible_card_ids.insert(result.GetString());