Reload Apn settings upon technology change

Service providers may require different APNs for
different radio access technologies (RATs).
If a RAT changes during a retry data connection
the device may repeatedly try to re-use invalid
APNs for the given technology.

This change adds a check for connection retry in
addition to failure to reload Apn settings.

bug: b/20098693
Change-Id: I5208699b06807e73bcb17413fa803c397249fbd7