- Retrieve is_drm in MediaMetadataRetriever.
- Add one more column in MediaStore to indicate whether a
  media file is drm-protected.
- Remove old DRM code from Ringtone
- Use the new DRM code in RingtoneManager

Change-Id: I1311fd1c04841c2cd47df6c901589966cf55a692
diff --git a/include/media/mediametadataretriever.h b/include/media/mediametadataretriever.h
index 28f305d..9aa6700 100644
--- a/include/media/mediametadataretriever.h
+++ b/include/media/mediametadataretriever.h
@@ -53,6 +53,7 @@
     METADATA_KEY_VIDEO_HEIGHT    = 19,
     METADATA_KEY_BITRATE         = 20,
     METADATA_KEY_TIMED_TEXT_LANGUAGES      = 21,
+    METADATA_KEY_IS_DRM          = 22,
 
     // Add more here...
 };