Lumias are known for their cameras and even economical Lumias have capable rear shooters and quite good FFCs. You can check our Lumia 640 XL and Lumia 540 camera reviews, if you have any doubts.
But there has been no Lumia with a FFC flash. But if a teaser from Evan Blass of Evleaks fame has to be taken into account one may be coming soon. We can easy guess that it must be one or both of the upcoming flagships Lumia 940 and Lumia 940 XL that may sport flash on the front too.