This is a copy of the widevine CL.
https://widevine-internal-review.googlesource.com/#/c/10174/
This CL adds the OEMCrypto v9 functionality to the level 3 haystack
version of OEMCrypto. Mostly, this is to support usage tables.
The code is feature complete, but the timing tests are a little flakey
-- I'm not sure if the problem is in the code or if the test has too
tight a tolerance.
Also, the storage of the generation number needs to be made more
secure.
Change-Id: I73fecf8934b6a46785f1f8b6f40b40ffe39b88de
d68e1f8307