Using the proper key to populate the artist name.

Use the key METADATA_KEY_ARTIST instead of
METADATA_KEY_ALBUMARTIST to update the artist name.

Change-Id: Id9beabe974848fb96d8f1ca2979f540e5da27a4b
CRs-fixed: 930738
diff --git a/src/com/android/music/MediaPlaybackService.java b/src/com/android/music/MediaPlaybackService.java
index dbfab4c..603d1a3 100644
--- a/src/com/android/music/MediaPlaybackService.java
+++ b/src/com/android/music/MediaPlaybackService.java
@@ -1067,7 +1067,7 @@
             RemoteControlClient.MetadataEditor ed = mRemoteControlClient.editMetadata(true);
             ed.putString(MediaMetadataRetriever.METADATA_KEY_TITLE, getTrackName());
             ed.putString(MediaMetadataRetriever.METADATA_KEY_ALBUM, getAlbumName());
-            ed.putString(MediaMetadataRetriever.METADATA_KEY_ALBUMARTIST, getArtistName());
+            ed.putString(MediaMetadataRetriever.METADATA_KEY_ARTIST, getArtistName());
             ed.putLong(MediaMetadataRetriever.METADATA_KEY_DURATION, duration());
             if ((mPlayList != null) && (mPlayPos >= 0) && (mPlayPos < mPlayList.length)) {
                 ed.putLong(MediaMetadataRetriever.METADATA_KEY_CD_TRACK_NUMBER,