Enable toggle for params encoding

[sumitsum]

Description

1. Add toggle param to ActionConfiguration class.
2. Add TCs to test toggle on/off/null.

Fixes #2897

Type of change

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

How Has This Been Tested?

Tested via Junit TCs. Add 3 TC:

1. for toggle set to true.
2. for toggle set to false.
3. for toggle see to null.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[trishaanand]

@sumitsum : If I understood the problem clearly, this was for body of content type form url encoded, NOT the url itself. Could you please confirm the requirements?

[trishaanand]

LGTM. Can be merged.