Ignore hasService in updateTelephonySignalStrength

A possible reason for empty triangle is there is no service, I'm
temporarily ignoring hasService in updateTelphonySignalStrength and
adding more debug.

Add logSSC to see history of Service State Changes.

Bug: 16148026
Change-Id: Ia463997eac7b062653b3cef00570d3fffc115ad3