Payload factory is not working properly for xml payload

[thuva9872]

Description

1. When trying to add a new payload factory mediator with xml payload, it is trying to encode the value.

The generated xml for this is as follows,

<payloadFactory media-type="xml" template-type="default">
	<format>&lt;xml/&gt;</format>
</payloadFactory>

2. Addition to that, if we manually modify the payload with a xml with templated expressions, it is not showing the xml properly.

<payloadFactory media-type="xml" template-type="default">
	<format>
		<xml>${payload}</xml>
	</format>
</payloadFactory>

The form view for the above configuration is as follows,

It is missing the xml content and only showing the expressions.

Steps to Reproduce

Issue 1

1. Try to add a payload factory with the payload <xml>${payload}</xml>.
2. Check the generated xml

Issue 2

1. Go to the generated xml in the above steps.
2. Replace the encoded payload with the original payload .
3. Open the form

Version

4.4.0

Environment Details (with versions)

No response