Merge from Widevine repo of http://go/wvgerrit/44505
This CL changes the certificate provisioning code to verify the
provisioning message using a cert from license.widevine.com instead of
the staging certificate.
It also adjusts the certificates in config_test_env.cpp because the
license and provisioning servers are different and may probably have
different certs.
bug: 73031756
test: unit tests with mock oemcrypto, and read oemcrypto on sailfish
Change-Id: I4b457a369a49ef07bda9e5632ab59e5f621ec966
5bd4dbb502