Add a missing file to print spooler resources

<?xml version="1.0" encoding="utf-8"?>

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<resources>

    <string-array name="pdf_printer_media_sizes" translatable="false">

        <item>NA_LETTER</item>

        <item>NA_GOVT_LETTER</item>

        <item>NA_LEGAL</item>

        <item>NA_JUNIOR_LEGAL</item>

        <item>NA_LEDGER</item>

        <item>NA_TABLOID</item>

        <item>NA_INDEX_3X5</item>

        <item>NA_INDEX_4X6</item>

        <item>NA_INDEX_5X8</item>

        <item>NA_MONARCH</item>

        <item>NA_QUARTO</item>

        <item>NA_FOOLSCAP</item>

    </string-array>

</resources>