Add the following stats. - Number of Spectral events received from the target - Number of consume_spectral_report() invocations - Number of fill_samp_msg() invocations - Number of SAMP messages that are ready to be sent to the user-space - Number of SAMP messages queued to the user-space Change-Id: I53fda4b309620043a77bc2bc87573941d7fb0bcb CRs-Fixed: 3156151