[ Merge of http://go/wvgerrit/173290 ]
* Renew timer offset from when license is loaded verifies that the
rental duration has not expired and begins decryption.
* Renew timer offset from first decrypt bugfix
* Feature is enabled based on oemcrypto v18 presence
* Renewal logic verifies that |can_renew| is enabled
* Unit tests were added to reflect use cases from duration
and renewal documentation
Bug: 278751387
Test: policy unittests, CdmUseCase tests, wvts tests
Change-Id: I3070b3f31b316e150c28ebe38d0440ab1eeb89b9