Devices returns the list of attached Fuchsia devices.

Monitor updates the registry with devices that are added and removed at the specified interval.

ParseDevices parses the json formatted device list from ffx.

ErrInvalidDeviceList May be returned if the device list could not be parsed.

ErrNoDeviceList May be returned if the ffx fails to return a device list when asked.

Start tracing command failed.

Tracing file couldn't be written to.

Trace providers command failed.

Trace providers format.

FFX is the path to the ffx executable, or an empty string if the ffx executable was not found.

DeviceList is a list of devices.