Like how Google has added Android app support to Chrome OS, Google now appears to be doing the same with the still elusive Fuchsia OS. As identified by 9to5google, changes made in the Gerrit code make the Fuchsia OS use a specialized version of Android Runtime (ART) to run Android apps.
As an operating system can be done or destroyed by the application library, Google assumes that it wants to hit the ground on the application front. Fortunately, it has the most popular mobile operating system with a large library of apps in the Play Store. It seems that Google is planning to take advantage of this advantage if and when it decides to launch Fuchsia.
It is still unclear how ART will run in the Fuchsia OS. It is possible that Google may use an approach similar to how the Linux subsystem works in Windows 1
What is even more unclear is if and when Google will officially release the Fuchsia OS and a supportive device. But if you are curious to see the OS in its early stages and you have an extra Pixelbook lying around, you can install the Fuchsia OS on it, or if you want to see Fuchsia in action, you can check it here.