[fusb302][vim3] Revise Fusb302 controller class.

This CL switches the Fusb302 controller to use the new classes that have
been landed recently.

fusb302-test.cc is deleted because the controller class is now
coordinating between tested subclasses. Its tests are covered by the
unit tests associated with the subclasses.

state-machine.cc is deleted because keeping it building would have
caused more churn. Other replaced code will be deleted by follow-up CLs.

Bug: 122113
Tested: Framework Gen 12 laptop USB-C port - 5V @ 3A PD Contract
Tested: Dell LA65NM190PS 65W USB-C power supply - 9V @ 3A PD Contract
Tested: Google-branded Chicony W16-045NSA - No PD Contract, 5V
Tested: Lenovo MC-301 - No PD Contract, 5V
Tested: Macbook Pro M1 USB-C port - 5V @ 3A PD Contract
Change-Id: I815dfc481851b78e90b901d29699b0cde90ca962
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/823187
Commit-Queue: Victor Costan <costan@google.com>
Fuchsia-Auto-Submit: Victor Costan <costan@google.com>
Reviewed-by: Sam Hansen <hansens@google.com>