Missing annotations for the recently added remote schema registry support.

Based on the below PR implementation, new Kafka binding related attributes got added to the Kafka extension. 
`SchemaRegistryUrl`
`SchemaRegistryUsername`
`SchemaRegistryPassword`
https://github.com/Azure/azure-functions-kafka-extension/pull/411

We need to have those to be added to the SDK to support this new feature in Java functions as well.