[BUG] Add Parameter preset in fulfillment builder doesn't accept boolean

[smadnaik]

DF CX allows us to set boolean values as parameter presets in the fulfillments. The current Scrapi implementation restricts this by only allowing string value

Expected Behavior

add_parameter_presets() in the class FulfillmentBuilder should allow boolean in the parameter_map parameter. The acceptable dict should be allow dict values to be boolean so it accepts Dict[str,boolean] instead of only Dict[str,str]
The DFCX console allows us to add boolean values as the parameter preset. The SetParameterAction method from Google's DFCX API allows values of type 'any'

Current Behavior

The add_parameter_presets() in the class FulfillmentBuilder expects the parameter_map to be Dict[str,str] which results in the following ValueError when a Dict[str,boolean] is passed

"Only strings are allowed as"
" dictionary keys and values in parameter_map."

Possible Solution

Steps to Reproduce

1. Create a dfcx_scrapi.builders.fulfillments.FulfillmentBuilder object
2. Call add_parameter_presets method using the FulfillmentBuilder object
   Eg. fulfillment_builder.add_parameter_presets({"var_name" : True})
3. Scrapi API returns raise a Value Error

Context (Environment)

We often use boolean variables to set parameter preset for various routes. Currently we have to set any decision variables as "True" or "False" which is essentially string matching and not exactly if-else condition as it's efficient

Detailed Description

Possible Implementation