Add DelegateLastClassLoader to the list of WellKnownClassLoaders

Generalize CreatePathClassLoader from the class linker to be able to
create a well known class loader with a given parent.

For now, it only supports PathClassLoader and DelegateLastClassLoader.

Test: m test-art-host
Bug: 38138251
Change-Id: Iced0de7c21010c6d61dbf29a631e670011833a7d