Merge from Widevine repo of http://go/wvgerrit/49003
CopyOldUsageEntry currently needs the old usage table to be loaded via
CreateOldUsageEntry. The CDM uses a workaround by creating a dummy old
entry, but the OEMCrypto code should be responsible for this. However,
since there have been several versions released with the current
OEMCrypto spec, the CDM code would have to still exist to support
implementations of that spec. Therefore, in order to avoid having to
support both a CDM with this workaround removed (as well as updating
the spec) and a CDM with it still in place, this workaround should be
canonicalized.
b/65730828
Test: tested as part of http://go/ag/4674759
Change-Id: I4619c551b79a53746683519d284663bf513ec38d