Merge "Change KeyFactory context args to references." am: b963f5e6b9 am: fe481af2c0

Original change: https://android-review.googlesource.com/c/platform/system/keymaster/+/1530450

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I569f5efe7059c9a25c4386dde5088f18156dc829