IVGCVSW-3937 Make dynamic use the of the profiling connection

IVGCVSW-3937 Make dynamic use the of the profiling connection
in the SendCounterPacket class

 * Passing the profiling connection as an argument to the
   pertinent methods of the SendCounterPacket class, as the
   connection is created dynamically by the ProfilingService
 * Updated the unit tests accordingly

Signed-off-by: Matteo Martincigh <matteo.martincigh@arm.com>
Change-Id: Ibe72bdbad814a201c4f1505cff4badbb9b03b13e