Merge "Added 12 various attestation related vts tests. - Check for app id only...

Merge "Added 12 various attestation related vts tests. - Check for app id only if challenge is provided. - Verify self sign certificate works for RSA and Ecdsa. - Verified attestation is generated for encryption keys too. - Verify no attestation is generated for symetric keys. - Verify app id is always required when attestation challenge is   provided to the new key generation. - Verify app id is ignored when challenge is missing. - Verify app id length is properly encoded. - Added vts tests for various attestation success and fail cases." am: 04d6d4a1

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1673855

Change-Id: I7c401375c78fc5fb2e10aa0243c61f08bda45f22