This indicates the file is the core Android system partition. It contains the user interface, system apps, and framework.
To understand what this keyword means, it's easiest to break it down into its four core components: systemarm32aonlyimgxz full
Flash the new GSI: fastboot flash system system-arm32-aonly.img This indicates the file is the core Android system partition
When Project Treble debuted, Android devices were divided into two structural categories: systemarm32aonlyimgxz full