Add gdpr_consented_providers for google gdpr

[xiaofengC]

Type of change

• Feature

Description of change

Add a parameter gdpr_consented_providers for google gdpr solution.

• test parameters for validating bids

{
  bidder: '<bidder name>',
  params: {
    // ...
  }
}

Be sure to test the integration with your adserver using the Hello World sample page.

• contact email of the adapter’s maintainer
  xfchen@freewheel.tv
• official adapter submission

For any changes that affect user-facing APIs or example code documented on http://prebid.org, please provide:

• A link to a PR on the docs repo at https://github.com/prebid/prebid.github.io/

Other information