Merged from https://widevine-internal-review.googlesource.com/148554
This change was merged to master but missed in tm-dev when we stopped
the auto merging to tm-dev. Manually cherry picked it.
Test: ran OPK unit tests
Bug: 230820162
Bug: 180530495
Change-Id: Ib23f07f84096650beb4dd1950105db01e004d484