[Feature Request] Add support for PPS(publisher provided signals) [additionalParameters] API

[kennir]

Plugin Version

6.0.0

[REQUIRED] Step 2: Describe the problem

Add support for publisher provided signals API

[malandr2]

Hi @kennir, this is a valid request. PPS signals are provided via additionalParameters on an Extras object in iOS/Android. Currently, in the Flutter plugin, you can only pass <String, String> with extras.