Oculus Mobile/Audio SDK 1.0.0 in UE4 ?

Does UE4 require for Oculus Mobile and Audio SDKs (both 1.0.0 currently) to be pre-installed, or does UE4 come with those SDKs already built-in ? (UE4.10preview4 and on)

Oculus has Unity Utilities for Unity 5, so SDK isn’t required. However for spatialized audio there is a plugin for Unity. So I am wondering where UE4 is in terms of functionality on Gear VR and if it’s on par with current Unity 5 + Oculus Utils.