Answer may be:

The different layers in the android heap are considered android architecture. It comprises the operating system, the different application involves, and middlerwares. Each layer provides different services and functions. The four layers are: 

• Linux Kernal
• Libraries with android Runtime
• Application Framework
• Android Applications

To know more about android architecture, click on the link below:

https://tutorialslink.com/Articles/Introduction-to-Android/1132