Fix fronted ios

[jigar-f]

The latest fronted code crashed on IOS, the Reason being we were not setting fronted, on Android it's set by flashlight, This Pr should fix that issue

fronted.go

// Use a wrapper for fronted.NewDirect to avoid blocking
// `dualFetcher.RoundTrip` when fronted is not yet available, especially when
// the application is starting up
func (f frontedRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
	if f.opName != "" {
		op := ops.Begin(f.opName)
		defer op.End()
	}
	return fronter.RoundTrip(req)
}