Network time hierarchy
======================

Service		org.ofono
Interface	org.ofono.NetworkTime
Object path	[variable prefix]/{modem0,modem1,...}

Methods		dict GetNetworkTime()

			Returns the current time and date as notified
			by the cellular network.  The dictionary
			contains the following possible keys:

			int64 UTC [optional]
				Network time in seconds from epoch.
				Receiving entity obtains current real
				time by adding the value from monotonic
				clock e.g.
				clock_gettime(CLOCK_MONOTONIC,...) and
				substracting "Received" key value.

			int32 Timezone [optional]
				Current timezone offset in seconds from
				UTC.

			uint32 DST [optional]
				Current daylight saving setting in
				hours.

			int64 Received [optional]
				Monotonic time as returned by
				clock_gettime(CLOCK_MONOTONIC,...) when
				the network time is received.

			string MobileCountryCode
				The Mobile country code of the
				current network operator.

			string MobileNetworkCode
				The Mobile network code of the
				current network operator.

Signals		NetworkTimeChanged(dict)

			Returns a dictionary with the same keys as
			GetNetworkTime() when a NITZ event is received.

