Merge from widevine repo of http://go/wvgerrit/21521 On devices that use provisioning 3.0, the function OEMCrypto_GenerateSignature will only be used for a license renewal. This CL adds a call to OEMCrypto_GenerateSignature to the refresh key tests. Otherwise, there would be no coverage at all for that function. Change-Id: Icbd568eea3f9f256cc9b0b441f7907b316bb5b69