Describe the proposal

A few months ago we have upgraded Dapr Java SDK to use Java 11. Java 11 has native support for HTTP client. The proposal is to use the Java 11 HttpClient instead of OkHttpClient. While OkHttpClient is a nice library it adds yet another dependency that we have to manage and upgrade. Also the fact that OkHttpClient uses Kotlin adds another layer of complications since the Kotlin version in OkHttpClient might conflict with our customers Kotlin stdlib.