Properly implement Paint.breakText for layoutlib. (do not merge)

    @Override

    public int breakText(String text, boolean measureForwards,

                                float maxWidth, float[] measuredWidth) {

        // NOTE: javadoc doesn't match. Just a guess.

        return breakText(text,

                0 /* start */, text.length() /* end */,

                measureForwards, maxWidth, measuredWidth);

    }

    /**

     * Measure the text, stopping early if the measured width exceeds maxWidth.

     * Return the number of chars that were measured, and if measuredWidth is

     * not null, return in it the actual width measured.

     *

     * @param text  The text to measure

     * @param start The offset into text to begin measuring at

     * @param end   The end of the text slice to measure.

     * @param measureForwards If true, measure forwards, starting at start.

     *                        Otherwise, measure backwards, starting with end.

     * @param maxWidth The maximum width to accumulate.

     * @param measuredWidth Optional. If not null, returns the actual width

     *                     measured.

     * @return The number of chars that were measured. Will always be <=

     *         abs(end - start).

     */

    @Override

    public int breakText(CharSequence text, int start, int end, boolean measureForwards,

            float maxWidth, float[] measuredWidth) {

        char[] buf = new char[end - start];

        int result;

        TextUtils.getChars(text, start, end, buf, 0);

        if (measureForwards) {

            result = breakText(buf, 0, end - start, maxWidth, measuredWidth);

        } else {

            result = breakText(buf, 0, -(end - start), maxWidth, measuredWidth);

        }

        return result;

    }

    /**

     * Return the advance widths for the characters in the string.

     *