Configuration for the Omaha Client

| Field | Type | Description | Default |
|---|---|---|---|
| `server_url` | `\[string]` | If not specified, the hard-coded value in omaha-client-bin will be used |   |
| `policy_config` | `https://fuchsia.dev/reference/PolicyConfig` |   |   |
| `include_empty_eager_config` | `bool` |   |   |
| `channels_path` | `Option` | Deserializes to the ChannelConfig struct defined by SWD in //src/sys/pkg/lib/channel-config |   |