[bssl] Support EC P-384 key in libbssl_avf_nostd am: 306c8e2013

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/2852571

Change-Id: I97b563a4e5a49755da863c8471c32048adf8a34d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>