Update format of UEID claim.

Version 6 of the EAT proposal changed the format of the UEID claim. See
tools.ietf.org/html/draft-ietf-rats-eat-06#section-3.4 for more
information. This change brings our own EAT implementation in line with
that format.

Fix: 175369617
Test: atest keymaster_tests
Test: atest KeyAttestationTest
Test: atest CtsKeystoreTestCases
Change-Id: I1de2711e06b3840006d23328dec551b2f0e1182c
2 files changed