Support for P256 curve in RKP for Strongbox am: 8785f89b1d

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2962596

Change-Id: Ib08eed464f2e53d62b4a8e0ca831fa56ce1d2b83
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>