Timestamp: Collect and dump statistics

Test: Audioflinger dumpsys
Bug: 80502521
Change-Id: I8c7c8b0c2f0f51dc898ed96f6a973e20490022f1
diff --git a/services/audioflinger/FastMixerDumpState.cpp b/services/audioflinger/FastMixerDumpState.cpp
index b3a2520..d60643c 100644
--- a/services/audioflinger/FastMixerDumpState.cpp
+++ b/services/audioflinger/FastMixerDumpState.cpp
@@ -73,6 +73,7 @@
                 mNumTracks, mWriteErrors, mUnderruns, mOverruns,
                 mSampleRate, mFrameCount, measuredWarmupMs, mWarmupCycles,
                 mixPeriodSec * 1e3, mLatencyMs);
+    dprintf(fd, "  FastMixer Timestamp stats: %s\n", mTimestampVerifier.toString().c_str());
 #ifdef FAST_THREAD_STATISTICS
     // find the interval of valid samples
     uint32_t bounds = mBounds;