Merged from http://go/wvgerrit/175855
This includes testing overflow functions that are only used in the Widevine client repository.
This patch also includes the following fix for the previous commit:
Add type casting for ODK overflow function unit tests
Merged from http://go/wvgerrit/175893
The new ODK overflow unit tests are causing some unit test failures in oemcrypto-v18 due to mismatched type comparisons.
PiperOrigin-RevId: 535308670
PiperOrigin-RevId: 534890798
Change-Id: I8bb67e47193a92191a91c83bf8a0de61e1b87793
db670e7bcc