Merge from Widevine repo of http://go/wvgerrit/61262 This CL helps the CE CDM unit tests provision by providing a helper code to determine if OEMCrypto is L1 or L3. Test: unit tests Test: tested as part of http://go/ag/5501993 Bug: 37286053 Change-Id: Ibe358e0eb628b4051f2db3406eaa6fcfc07f07ff