Fix kotlin source compatibility with logger (#4927)

* Document broken kotlin source

* Fix existing code

okhttp-logging-interceptor/src/main/java/okhttp3/logging/LoggingEventListener.kt

@@ -150,6 +150,8 @@ class LoggingEventListener private constructor(
   open class Factory @JvmOverloads constructor(
     private val logger: HttpLoggingInterceptor.Logger = HttpLoggingInterceptor.Logger.DEFAULT
   ) : EventListener.Factory {
+    constructor(block: (string: String) -> Unit): this(HttpLoggingInterceptor.Logger(block))
+
     override fun create(call: Call): EventListener = LoggingEventListener(logger)
   }
 }