Spanish translations

Fixed some translations.

**Please, bring from arrays.xml**:

    <string-array name="cookiePreferences"><item>Accept all cookies</item>
    <item>Only accept whitelisted cookies</item>
    <item>Block all cookies</item>
    </string-array>

In Spanish:

    <string-array name="cookiePreferences"><item>Aceptar todas las cookies</item>
    <item>Aceptar sólo las cookies de la lista blanca</item>
    <item>Bloquear todas las cookies</item>
    </string-array>