• Exported areAnalyticsSuppressedIn, which reads DASH__SUPPRESS_ANALYTICS
  from a provided environment map instead of the real process environment.
  This lets tools with an overridable environment (such as dartdev) let
  DASH__SUPPRESS_ANALYTICS take precedence over their own implicit
  suppression, e.g.
  areAnalyticsSuppressedIn(environment, defaultValue: isBot).