aaudio: add MediaMetrics for MMAP streams

Log events from service.
Log start, stop, disconnect and other events.
Log underruns and bufferSize.

Bug: 154543374
Test: adb shell dumpsys media.metrics --clear
Test: run an app that uses MMAP, like OboeTester
Test: adb shell dumpsys media.metrics
Test: Expect to see lots of "audio.stream" events.
Change-Id: I690e5226b695d53d038d644f4438c759e08f9fbb
diff --git a/services/oboeservice/AAudioService.h b/services/oboeservice/AAudioService.h
index eddb5a0..7167868 100644
--- a/services/oboeservice/AAudioService.h
+++ b/services/oboeservice/AAudioService.h
@@ -115,6 +115,7 @@
     // and share them with this code. Look for "kPriorityFastMixer".
     static constexpr int32_t        kRealTimeAudioPriorityClient = 2;
     static constexpr int32_t        kRealTimeAudioPriorityService = 3;
+
 };
 
 } /* namespace android */