Merge "Bug fix setting of certificate serial on BIGNUM." am: 1fb0546ab4 am: 7e4286e3d7 am: c587ad32dd am: 95ddb3c9af

Original change: https://android-review.googlesource.com/c/platform/system/keymaster/+/1682249

Change-Id: I34446c31fc750ae5cf5a670ce37b26addaf82c44