With the availability of ArraysSupport.vectorizedHashCode I scanned the remainder of the JDK for places where it might be applicable.

There are only a couple of applicable places outside of java.base: one in java.rmi.MarshalledObject and one in javax.xml.crypto, none of which appear very important. We could of course expose ArraysSupport.vectorizedHashCode to more modules, but for now let's keep it java.base internal.