How do AOT and JIT work together in Android Nougat and later?

The Android OS was using interp years ago, then they added Just-In-Time (JIT). However, since Android 5.0, they replaced JIT with Ahead-Of-Time (AOT) compilation which increased app installation time quite a bit, so I wasn't following its development. Then in Android 7.0, it seemed JIT had come back, but I cannot understand how JIT and AOT would be able to work together. Does this mean they finally ditched AOT and switched back to JIT? (I have read some articles but since I have detached myself for a while from the follow ups to development, I am not sure if I still understand everything correctly.