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

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

Change-Id: Ie507686e9fb2d870a3a02ab5fbca2b28b1ab4f5d