KeyMint VTS: improve ATTESTATION_ID_ tests

Existing comment is incorrect: the ATTESTATION_ID_* values that the test
provided are rejected because they do not match the device values, not
because the tags are specific to device-unique attestation.

Fix the test comment (and make the values more obviously wrong), and
add a separate test that includes correct values of ATTESTATION_ID_*
values.

Test: VtsAidlKeyMintTargetTest
Change-Id: I5c5f5ef6a228990c9e46f90727e0f135dfc2c528