Merge "Do not strip trailing F's of test ICCID" am: 78a8259d

    @VisibleForTesting

    static final int FPLMN_BYTE_SIZE = 3;

    // ICCID used for tests by some OEMs

    // TODO(b/159354974): Replace the constant here with UiccPortInfo.ICCID_REDACTED once ready

    private static final String TEST_ICCID = "FFFFFFFFFFFFFFFFFFFF";

    // A table mapping from a number to a hex character for fast encoding hex strings.

    private static final char[] HEX_CHARS = {

            '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'

     * Strip all the trailing 'F' characters of a string, e.g., an ICCID.

     */

    public static String stripTrailingFs(String s) {

        if (TEST_ICCID.equals(s)) {

            return s;

        }

        return s == null ? null : s.replaceAll("(?i)f*$", "");

    }