fusion3: fix network search (QUERY_AVAILABLE_NETWORKS)

Sony sends 5 operator info elements
Alpha long, Alpha short, Numeric, Network state, Network type

Upper layer expects 4 elements.
Alpha long, Alpha short, Numeric, Network state

Recalculate the number of elements (multiple of 4) and drop
every 5th element.

Change-Id: I94b35757826685a9b06305ca72aa940fae232d6d