IVGCVSW-3937 Update the Send thread to send out the Metadata packet

IVGCVSW-3937 Update the Send thread to send out the Metadata packet

 * The Send thread now automatically sends out Stream Metadata packets when
   the Profiling Service is in WaitingForAck state
 * Added a reference to the profiling state in the SendCounterPacket class
 * Moving the RuntimeException thrown in the Send thread to the main thread
   for rethrowing
 * The Stop method now rethrows the exception occurred in the send thread
 * The Stop method does not rethrow when destructing the object
 * Added unit tests

Signed-off-by: Matteo Martincigh <matteo.martincigh@arm.com>
Change-Id: Ice7080bff63199eac84fc4fa1d37fb1a6fcdff89