[BUG] Https protocol schema is not handled correctly in java 11 native code #3729 (#3730)

* added getter for schema

samples/client/petstore/java/native/src/main/java/org/openapitools/client/ApiClient.java

@@ -263,6 +263,17 @@ public class ApiClient {
     return scheme + "://" + host + (port == -1 ? "" : ":" + port) + basePath;
   }
 
+  /**
+   * Set a custom scheme for the target service, for example 'https'.
+   *
+   * @param scheme The scheme of the target service
+   * @return This object.
+   */
+  public ApiClient setScheme(String scheme){
+    this.scheme = scheme;
+    return this;
+  }
+
   /**
    * Set a custom request interceptor.
    *