ANDROID: fips140: refactor and rename fips140_lab_test

fips140_lab_test doesn't really do any tests per se, but rather is a
utility program that dumps some output.  The actual "test" is when the
lab checks the output; we aren't allowed to check it ourselves.

We also need to add some new functionality, which would work well as
sub-commands.  Also, the original idea was that this was just sample
code which the lab would modify, but that's not actually happening.

Therefore, rename fips140_lab_test to fips140_lab_util, and refactor its
functionality into sub-commands 'show_module_version' and
'show_service_indicators'.  This fits better with what is needed.

Bug: 188620248
Change-Id: I7da84a139283f185f79b8d866547151169f26415
Signed-off-by: Eric Biggers <ebiggers@google.com>