Encode using UTF-8 if return has funny characters

Issue:201744

(cherry picked from commit e396e18)

Author: tomas-sexenian

java/src/main/java/com/genexus/internet/HttpClientJavaLib.java

@@ -714,6 +714,9 @@ public String getString() {
 				charset = StandardCharsets.UTF_8;
 			}
 			String res = EntityUtils.toString(entity, charset);
+			if (res.matches(".*[Ã-ÿ].*")) {
+				res = EntityUtils.toString(entity, StandardCharsets.UTF_8);
+			}
 			eof = true;
 			return res;
 		} catch (IOException e) {