Fix kotlin nullable errors that were exposed by setting the retention
of android.annotation.NonNull and android.annotation.Nullable to
class retention.

Bug: 294110802
Test: builds
Change-Id: I0736e8abf503c80b92e3762bed908400ffedb335

Introduce "android.key_owned_by_system" optional requirement to
AttestationVerificationPeerDeviceVerifier that may be used with both
supprted binding types - TYPE_PUBLIC_KEY and TYPE_CHALLENGE.

Implement checking if the leaf certificate public key is owned by the
system if the "android.key_owned_by_system" key is present in the
requiremenets bundle.

Bug: 224954254
Bug: 202926196
Test: AVF tests
Change-Id: I79ca0ff2263bd8babb7dace1a9a3f8848ab21454

Bug: 216477071
Test: AttestationVerificationTest unit test
Change-Id: Ide254de1aaaad24a5ac9e449086192aa9f59a72b

Bug: 216477071
Test: AttestationVerificationTest unit test
Change-Id: Ide254de1aaaad24a5ac9e449086192aa9f59a72b

Implementing PROFILE_SELF_TRUSTED for testing purposes.

Bug: 216476609
Test: SystemAttestationVerificationTest unit test
Change-Id: Ie0ecf2f88dcc9591ca41dc7d9f30f8727bb5fa1e

Bug: 201696614
Change-Id: I4a7a830ba809ed59a030a87c4f479199685d8a42
Test: atest AttestationVerificationTest

Change-Id: Ic8400aa7c7e4506f57e6ce50dd5856692108385d