Updated the BootLoaderStateTest for strongbox implementations which
do not support factory attestation.
Test: vts -m VtsAidlKeyMintTarget
Change-Id: I8fe176a18fc0b9e2b2d0b012b7b63124d15c9e2f
No tests are instantiated if KeyMint is present on the the device.
Explicitly allow that.
Bug: 277975776
Test: VtsAidlKeyMintTargetTest
Change-Id: I88f1c0a81f36d198dabcb1420b62a00bacdbb6e7