chat: lowercase service method name.
chat: lowercase service method name.

MultiPart: 3/3

Change-Id: I0bbf898ebb89459a7023b61dfd0b41fb2b424362

vanadium/chat,vanadium/chat,viksit/chat,vanadium/chat,viksit/chat,vanadium/chat,viksit/chat,viksit/chat,viksit/chat,vanadium/chat