Revert changes in HttpException

Keep HttpException public, as it is returned as the original exception when an HTTP error occurs.

Author: hamorillo

gravatar/api/gravatar.api

@@ -750,6 +750,11 @@ public final class com/gravatar/services/GravatarResult$Success : com/gravatar/s
 	public fun toString ()Ljava/lang/String;
 }
 
+public final class com/gravatar/services/HttpException : java/lang/RuntimeException {
+	public final fun getCode ()I
+	public fun getMessage ()Ljava/lang/String;
+}
+
 public final class com/gravatar/services/ProfileService {
 	public static final field LOG_TAG Ljava/lang/String;
 	public fun <init> ()V

gravatar/src/main/java/com/gravatar/services/HttpException.kt

@@ -5,10 +5,11 @@ import retrofit2.Response
 /**
  * Exception thrown when an HTTP error occurs in a non-cathing method.
  *
- * [rawErrorBody] The raw error body of the response.
  * [code] The HTTP status code.
+ * [message] The HTTP status message.
  */
-internal class HttpException internal constructor(response: Response<*>) : RuntimeException() {
-    val rawErrorBody: String? = response.errorBody()?.string()
-    val code: Int = response.code()
+public class HttpException internal constructor(response: Response<*>) : RuntimeException() {
+    internal val rawErrorBody: String? = response.errorBody()?.string()
+    public val code: Int = response.code()
+    public override val message: String = "HTTP ${response.code()} $rawErrorBody"
 }