(This is a merge of wvgerrit/25582)
Provisioning 3.0 devices that do not use SPOIDs have been returning
their full OEM Public Certificate as their device ID. While this is not
a security concern, (it is a PUBLIC cert) the cert is many times larger
than applications are likely expecting. (several kilobytes vs. just a
few bytes) This patch hashes the OEM Public Certificate to produce a
smaller value, but only when it is being provided out of the CDM to a
caller.
Bug: 34716264
Test: run_all_unit_tests.sh
Change-Id: Ib82cf7a174a8bf02ff606edd0394ada13842224c
8513b71499