Merge "Added vts tests for certificate subject and serial for various...

Merge "Added vts tests for certificate subject and serial for various algorithms and self sign or non-self sign certificates." am: f04466c0 am: 46fe94ee am: a1b895cd am: 57c91143

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1682337

Change-Id: I532266599c31119d652f2050b5f279882776a042