Specifies whether in-product Brave surveys are shown to users.

Brave in-product surveys collect user feedback for the browser. Survey responses are not associated with user accounts. When this policy is Enabled or not set, in-product surveys may be shown to users. When this policy is Disabled, in-product surveys are not shown to users. This policy has no effect if MetricsReportingEnabled is set to Disabled, which disables in-product surveys as well.