scd:openpgp: Support UIF changing command.

* g10/card-util.c (uif, cmdUIF): New.
(card_edit): Add call to uif by cmdUIF.
* scd/app-openpgp.c (do_getattr): Support UIF-1, UIF-2, and UIF-3.
(do_setattr): Likewise.
(do_learn_status): Learn UIF-1, UIF-2, and UIF-3.

(cherry picked from commit 0cb65564e022fface5ada4de8e0c2c4c3d0ac8ad)
Also included the relevant part from
commit 0240345728a84d8f235ce05889e83963e52742eb

Note that this patch is mainly to simplifying backporting and not to
support the UIF.

• GnuPG-bug-id: T4158
• Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>