fixed empty fav list icon

src/main/java/com/owncloud/android/ui/fragment/ExtendedListFragment.java

@@ -646,7 +646,7 @@ public class ExtendedListFragment extends Fragment
                             R.string.file_list_empty, R.drawable.ic_search_light_grey);
                 } else if (searchType == SearchType.FAVORITE_SEARCH) {
                     setMessageForEmptyList(R.string.file_list_empty_headline_server_search,
-                            R.string.file_list_empty_favorites, R.drawable.ic_favorite_grey);
+                            R.string.file_list_empty_favorites, R.drawable.ic_star_light_grey);
                 } else if (searchType == SearchType.VIDEO_SEARCH) {
                     setMessageForEmptyList(R.string.file_list_empty_headline_server_search_videos,
                             R.string.file_list_empty_text_videos, R.drawable.ic_list_empty_video);