Changes

SmspTpScAddr: fix SMSP record length and alpha_id padding

apply_val() was re-encoding the SMSP with the minimum total_len of 28,
which produces a 28-byte body with no alpha_id field.  After a DER
round-trip, the profile machinery re-pads the body to the original
record length using the template's fill pattern, which may not be 0xFF.
Those non-0xFF fill bytes end up in the alpha_id area, and GSM 7-bit
decoding then fails with a KeyError when the modified profile is read
back.

Fix by:
- setting alpha_id = '' so the field is present but empty
- setting f_smsp.rec_len = 42 (28 fixed bytes + 14 bytes of alpha_id
  padding) so the re-encoded body carries 0xFF-padded alpha_id space
  and the efFileSize in the fileDescriptor stays consistent
- passing total_len=f_smsp.rec_len to encode_record_bin() so the
  alpha_id area is actually padded to that length

Change-Id: Ief6e02517f3e96158a2509d763b88aec4bd5a296
Jenkins: skip-card-test