[ Merge of http://go/wvgerrit/74443 ]
When deleting a usage entry, a crypto session may need to be closed
and reopened if a usage entry has previously been loaded. Before closing
this session, the usage entry/usage table header information should be
saved.
This is for completeness rather than correctness. Looking at code,
usage header and entry information are saved after the license
release has been generated. This change might be helpful in case
that changes in the future.
Bug: 115920873
Test: CE CDM unit tests, WV unit/integration tests
Change-Id: Ifc8f761497198247db31dab2f47e8323af783681
f9ad1dad69