IVGCVSW-3937 Improve the Connection Acknowledged Handler

IVGCVSW-3937 Improve the Connection Acknowledged Handler

 * The Connection Acknowledged Handler should report an error
   is it's called while in a wrong state
 * Stopping the threads in the ProfilingService before having
   to start them again
 * Updated the unit tests to check the changes
 * Removed unnecessary Packet.cpp file
 * Fixed memory leak

Signed-off-by: Matteo Martincigh <matteo.martincigh@arm.com>
Change-Id: I8c4d33b4d97994df86fe6c9f8c659f880ec64c16