Make dumpsys(media.player) more useful by having AwesomePlayer populate it.

Change-Id: I12ba7d542331a8293d67a0d47378b8be4f777759
diff --git a/include/media/MediaPlayerInterface.h b/include/media/MediaPlayerInterface.h
index f0401cc..18e8a5f 100644
--- a/include/media/MediaPlayerInterface.h
+++ b/include/media/MediaPlayerInterface.h
@@ -168,6 +168,10 @@
         if (mNotify) mNotify(mCookie, msg, ext1, ext2, obj);
     }
 
+    virtual status_t dump(int fd, const Vector<String16> &args) const {
+        return INVALID_OPERATION;
+    }
+
 private:
     friend class MediaPlayerService;