Where is the background image column in SearchManager?

[bansteen]

I could not find any column to set background image inside SearchManager class.
When Google Play app's search result is selected, a background image is displayed but I don't seem to find any public api/column to set it.

Here is my code for content provider's query method

@Nullable
    @Override
    public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
                        String sortOrder) {
        final String searchKey = (selectionArgs == null) ? "" : selectionArgs[0];
        if (!TextUtils.isEmpty(searchKey)) {
            // Get title list from search query
            ArrayList<TitleSimpleInfo> searchedTitleList = searchTitlesWithKeyword(searchKey);
            // return null cursor if no data found
            if (searchedTitleList == null || searchedTitleList.isEmpty()) {
                return null;
            }
            // prepare cursor
            MatrixCursor matrixCursor = new MatrixCursor(new String[]{
                    SearchManager.SUGGEST_COLUMN_TEXT_1,
                    SearchManager.SUGGEST_COLUMN_TEXT_2,
                    SearchManager.SUGGEST_COLUMN_CONTENT_TYPE,
//                    SearchManager.SUGGEST_COLUMN_PRODUCTION_YEAR,
                    SearchManager.SUGGEST_COLUMN_INTENT_ACTION,
                    SearchManager.SUGGEST_COLUMN_INTENT_DATA,
                    SearchManager.SUGGEST_COLUMN_RESULT_CARD_IMAGE,
            });
            // add search result to cursor
            for (TitleSimpleInfo title : searchedTitleList) {
                matrixCursor.addRow(new Object[]{
                        title.getTitleName(),
                        title.getTitleCatch(),
                        SEARCH_CONTENT_TYPE,
//                        title.getReleaseYear(),
                        Intent.ACTION_SEARCH,
                        SEARCH_INTENT_DATA + title.getTitleCode(),
                        SEARCH_IMAGE_HEADER + title.getThumbnailUrl(),
                });
            }
            return matrixCursor;
        } else {
            return null;
        }
    }

Any idea guys?

Device: Nexus player