Merge from widevine repo of http://go/wvgerrit/14708
This CL adds a test to verify that oemcrypto is a level 1 device. It
is part of oemcrypto_test_android.cpp, so it only applies to android
devices and to the widevine buildbot which also runs the android tests.
bug: 21814204
Change-Id: Icbcdd3496fb8a656891bd7c873c60cba23c9666a