It could also be the brake pad caliper guide pins as it was in my 2013. Mine needed to be cleaned, lubed and reinstalled. Dealer Tech said they corrode due lack of use. Can you make it click by rocking the car back and forth when parked in your garage?
Google "clicking brake pad guide pins". It's a common problem exasperated by lack of use.
Google "clicking brake pad guide pins". It's a common problem exasperated by lack of use.