Log audio information to ensure complete delivery

Test: Audio playback
Bug: 30572472
Change-Id: Ibad6fc202692cd3480ae726627252afdead083f3
diff --git a/media/libmedia/AudioTrack.cpp b/media/libmedia/AudioTrack.cpp
index 7663fef..d322f05 100644
--- a/media/libmedia/AudioTrack.cpp
+++ b/media/libmedia/AudioTrack.cpp
@@ -653,6 +653,8 @@
         mState = STATE_STOPPING;
     } else {
         mState = STATE_STOPPED;
+        ALOGD_IF(mSharedBuffer == nullptr,
+                "stop() called with %u frames delivered", mReleased.value());
         mReleased = 0;
     }