Fixing CBOR parsing/serialization for prod keys.

Production keys are 6 bytes smaller than test keys due to the absence of
an entry in the COSE_Key map which would denote that key as a test key.
(-70000, nil). This patch properly adjusts for the size difference
between the two keys.

Ignore-AOSP-First: CP from AOSP to SC-Dev
Bug: 189018262
Test: Let the provisioner run.
Change-Id: I9ff0c99e58a1691c8e7bdedb0cbeafb683b39722
1 file changed