class Register

Informs the driver framework of an ephemeral driver. The metadata will

be cached by the driver index to be used in future matching operations.

* error a zx_status value indicating failure. One of the following:

* `ZX_ERR_PROTOCOL_NOT_SUPPORTED` if the ephermeral driver config

`enable_ephemeral_drivers` is not enabled.

* `ZX_ERR_ACCESS_DENIED` if the device does not have permissions

to fetch the package.

* `ZX_ERR_ALREADY_EXISTS` if the driver component being registered

already exists in the boot or base drivers list.

* `ZX_ERR_NOT_FOUND` if the package does not exist or it is missing

a manifest or /pkg directory.

* `ZX_ERR_IO` if there is some other unspecified error during I/O.

* `ZX_ERR_ADDRESS_UNREACHABLE` if the package resolver does not

know about the repo or the url cannot be parsed.

* `ZX_ERR_INVALID_ARGS` if the component decl cannot be parsed.

* `ZX_ERR_NO_SPACE` if the device is out of space.

* `ZX_ERR_UNAVAILABLE` if the package resolver could not be reached.

* `ZX_ERR_INTERNAL` if an unspecified error was encountered.