class SetInterface

Called to set an alternate setting for an interface due to a `SET_INTERFACE` control

request.

The protocol server (of [`UsbFunctionInterface`]) must use [`UsbFunction.ConfigureEndpoint`]

and [`UsbFunction.DisableEndpoint`] to configure or disable the interface's endpoints as

appropriate for the new alternate setting.

Depending on the alternate setting definition, this transition may require configuring new

endpoints (via `ConfigureEndpoint`), disabling existing endpoints (via `DisableEndpoint`),

or doing both. If an alternate setting does not use any endpoints, no endpoint

configuration calls are required.

The protocol server must perform all endpoint configuration/disabling and wait for those

calls to complete before replying to this method. This ensures that the protocol client can

report success/failure back to the host (by ACK'ing or STALL'ing the `SET_INTERFACE`

request).

Any error returned by this method causes the peripheral controller to stall Control

Endpoint 0, signaling a failure to the host (rejecting the `SET_INTERFACE` request).

* error:

* `ZX_ERR_NOT_SUPPORTED` if the alternate setting is not supported.

* `ZX_ERR_INVALID_ARGS` if the interface or alt_setting is invalid.

* Other errors if the function driver fails to configure or disable endpoints for the

new setting.