I don't think so but it seems you two are mixing Android and AOSP.
Android is owned by Google. AOSP is not.
I might be wrong on this but it seems to me they're replacing in Android, the OS shipped with many smartphones, parts that have open licenses, i.e. parts from AOSP. Like they are replacing open parts of code with privative parts of code.
Some people love whatever Mac/Windows does in UI for some reason. Most popular and downloaded themes on opendesktop.org are almost always whatever that resembles Mac/Windows for this reason.