How close is Google to supporting 64-bit in Android? For Apple the story is much more than the 64-bit A7 chip, but iOS 7 and Xcode all being released with high

How close is Google to supporting 64-bit in Android? For Apple the story is much more than the 64-bit A7 chip, but iOS 7 and Xcode all being released with highly polished support for the A7.