(This is a merge of http://go/wvgerrit/107263.)
The CryptoSessionMetricsTest suite assumed that GetOEMPublicCertificate
would only be called once, but in practice, it may be called twice,
since the first call can return OEMCrypto_ERROR_SHORT_BUFFER. This patch
updates the tests to accept 1 or 2 calls.
This patch also updates a few EXPECTs on vector lengths that should have
been ASSERTs, to avoid problems when later accessing the vector.
Bug: 169111969
Test: jenkins/ce_cdm_tests
Test: build_and_run_all_unit_tests.sh
Change-Id: I9432dd2694c7181ab57ed55f66ff6c8be0c867f9
25489dfa5b