Merge "Make MGF1 Digest setter NotNull" into main am: 6fee432f44

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2832673

Change-Id: I17a76d99ef8f94df15f76326c37d766f9bf0ba0d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>