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

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

Change-Id: Ibfe6dce0a2581ecde6c0b9c7dea3eac55ad5451d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>