Bug: 251240681 Merged from https://widevine-internal-review.googlesource.com/179570 Change-Id: Ieb3e2dc0de3ad33c6407ee4cbcfbd39641b6df4c
Refactor the cast related oemcrypto unit tests into a separate file. Bug: 253779846 Merged from https://widevine-internal-review.googlesource.com/176930 Change-Id: I937042f786d1cc973e186d76bd276cbc792dfc19