MediaMetrics: Prepare audio device usage protos for statsd

MediaMetricsAudioRecordDeviceUsageReported
MediaMetricsAudioThreadDeviceUsageReported
MediaMetricsAudioTrackDeviceUsageReported
MediaMetricsAudioDeviceConnectionReported

Add track traits to identify static AudioTracks.
Fix AudioTrack/AudioRecord flag communication.
Move debug logging to verbose (delivered protos show in dumpsys).
Unknown strings which fail validation become empty.
Test statsd type validation.

Test: atest mediametrics_tests
Test: adb shell dumpsys media.metrics (after BT connection)
Test: statsd_testdrive (294-297)
Bug: 149850236
Change-Id: I53c5d18a346af54941007b9938a8ab10e34b7038
diff --git a/services/mediametrics/AudioAnalytics.h b/services/mediametrics/AudioAnalytics.h
index 138ddcc..809de19 100644
--- a/services/mediametrics/AudioAnalytics.h
+++ b/services/mediametrics/AudioAnalytics.h
@@ -17,6 +17,7 @@
 #pragma once
 
 #include <android-base/thread_annotations.h>
+#include <audio_utils/SimpleLog.h>
 #include "AnalyticsActions.h"
 #include "AnalyticsState.h"
 #include "AudioPowerUsage.h"
@@ -122,6 +123,8 @@
 
     TimedAction mTimedAction; // locked internally
 
+    SimpleLog mStatsdLog{16 /* log lines */}; // locked internally
+
     // DeviceUse is a nested class which handles audio device usage accounting.
     // We define this class at the end to ensure prior variables all properly constructed.
     // TODO: Track / Thread interaction
@@ -173,6 +176,7 @@
         AudioAnalytics &mAudioAnalytics;
 
         mutable std::mutex mLock;
+        std::string mA2dpDeviceName;
         int64_t mA2dpConnectionRequestNs GUARDED_BY(mLock) = 0;  // Time for BT service request.
         int64_t mA2dpConnectionServiceNs GUARDED_BY(mLock) = 0;  // Time audio service agrees.