Merge from Widevine repo if http://go/wvgerrit/13781 This CL adds several unit tests that are specifically designed to test features that are required for Android CDM but not other platforms. Once this CL has been merged, future CLs will modify the main oemcrypto test file so that some tests are skipped if their features are not implemented. Change-Id: I55b8cbb9c13d2db88bd4f56bba31a4aab3306067