Respect limited requirements for Strongbox KM implementations

With this patch the KM VTS test apply the restricted requirements on
supported key sizes, EC curves, and Digests to Strongbox keymaster
implementations.

Also amend tests to use Update().

Test: Yes it is
Bug: 74519020
Change-Id: Ibec9c3398671f81dbc0ecf78e554726276160579
(cherry picked from commit 3a7e2cad)