Add a key to Credential Management (#2057)

Author: Elchi3

features/credential-management.yml

@@ -23,6 +23,7 @@ status:
 compat_features:
   - api.Credential
   - api.Credential.id
+  - api.Credential.isConditionalMediationAvailable_static
   - api.Credential.type
   - api.CredentialsContainer
   - api.CredentialsContainer.create

features/credential-management.yml.dist

@@ -69,3 +69,9 @@ compat_features:
   #   safari: "17"
   #   safari_ios: "17"
   - api.CredentialsContainer.preventSilentAccess
+
+  # baseline: false
+  # support:
+  #   safari: "16"
+  #   safari_ios: "16"
+  - api.Credential.isConditionalMediationAvailable_static