AliCoil Various packages do various things. A lot of AOSP code (though not all of it) was contributed by Google's Android division, and thus the package names start with com.android.
If a package shipped with the OS, the GrapheneOS developers believe it is doing something reasonable, and in many cases something necessary.
Below the Android package layer, there is enormous amounts of code in GrapheneOS, written by many people, including lots of code in the kernel written by Google. Firmware is written by Google, Broadcom, ARM, etc.