fix(pipeline): reactivate options java-like stringifications

Pipeline options parsing is not updated yet to support csharp like stringification (like boolean stringified to "True" or "False").

Common/DaisyConverterLib/Pipeline/Pipeline2/Pipeline2.cs

@@ -371,8 +371,8 @@ public IntPtr Start(string scriptName, Dictionary<string, object> options = null
                 {
                     // Note : the hashmap expects list of strings as options valu
                     stringifiedOptions[option.Key] = new List<string>() {
-                        //StringifyOption(jni, option.Value),
-                        option.Value.ToString() // possible only after referenced pipeline framework is updated to enable a more relaxed value check (https://github.com/daisy/pipeline-framework/commit/46dc1aeb6918da24640d327c7f6cd2b0c44b1dd5)
+                        StringifyOption(jni, option.Value),
+                        //option.Value.ToString() // possible only after referenced pipeline framework is updated to enable a more relaxed value check (https://github.com/daisy/pipeline-framework/commit/46dc1aeb6918da24640d327c7f6cd2b0c44b1dd5)
                     };
                 }
                 IntPtr hashMap = jni.NewJavaWrapperObject(stringifiedOptions);