Further work on libmediametrics stable API

implement a missing method (for inflight metrics), enumerate exported
symbols.

Bug: 119675363
Test: build, CTS media/codec tests
Change-Id: Id92f1b331babacc0de6c0005d6ba0c97c91c0291
diff --git a/media/libmediametrics/IMediaAnalyticsService.cpp b/media/libmediametrics/IMediaAnalyticsService.cpp
index 28a7746..9114927 100644
--- a/media/libmediametrics/IMediaAnalyticsService.cpp
+++ b/media/libmediametrics/IMediaAnalyticsService.cpp
@@ -142,7 +142,7 @@
             CHECK_INTERFACE(IMediaAnalyticsService, data, reply);
 
             bool forcenew;
-            MediaAnalyticsItem *item = new MediaAnalyticsItem;
+            MediaAnalyticsItem *item = MediaAnalyticsItem::create();
 
             data.readBool(&forcenew);
             item->readFromParcel(data);