Revert "Swap the order of creating IAudioTrack and thread"

This reverts commit 5d464eb0b8cffb994a754ff108795e858a882414.
It caused the wrong thread ID -1 to be passed to IAudioFlinger::createTrack().

Change-Id: Ic221d2bb4af572d3d2d752af19238c52f6728e3a
diff --git a/include/media/AudioTrack.h b/include/media/AudioTrack.h
index 4488ce4..26a25b0 100644
--- a/include/media/AudioTrack.h
+++ b/include/media/AudioTrack.h
@@ -473,7 +473,7 @@
         friend class AudioTrack;
         virtual bool        threadLoop();
         AudioTrack& mReceiver;
-        virtual ~AudioTrackThread();
+        ~AudioTrackThread();
         Mutex               mMyLock;    // Thread::mLock is private
         Condition           mMyCond;    // Thread::mThreadExitedCondition is private
         bool                mPaused;    // whether thread is currently paused