I am not sure where you found this information but I can tell you that it is false. If you look at the Naval Academy website you can find this
I can also validate that as of the Class of 2020 they are taking AP and College credits into consideration. DS is currently, a plebe that came out of high school with a large amount of AP and Dual Credit classes (enough to earn an Associates Degree) and while he still has to do 4 years like everyone else he was able to skip numerous classes. He is working with his counselors to manage his schedule and at the moment it is looking like he will be double majoring but even with a double major he is able to take a lighter course load than most his plebe year which is very helpful.
As stated above not only do AP classes help with admissions but if you take the right ones they can impact your overall academy experience.