My device's "Vendor Class ID" is
dhcpcd-5.2.10:Linux-3.0.8-gb55e9ac:armv7l:herring. I don't know what Vendor Class ID is, but how do I change it to something else?
My question is not related to programming.
The Vendor ID that @MatthewRead mention is used for the PC drivers. What you are talking about is a DHCP Vendor Class Identifier.
From Microsoft Technet (not android specific, but has the same meaning)
To answer the question if you can change this, I do not know of any configuration settings anywhere within android that let you change this. Based on the one you put in your question, it looks like android creates the VCI from the following:
for the board type, you have herring, so if you opened up a shell and typed