tests: Add a test to cover legacy care_map.txt handling.

This is to cover the code added by commit
5a1dee01, where an O update_verifier
should not reject N care_map.txt.

Bug: 63544345
Test: recovery_component_test passes on marlin.
Change-Id: Ia944e16cba3cc635098b3ffd92842d725b570fec
(cherry picked from commit c319613e)