Merge "Replace Preconditions.checkNotNull with Objects.requireNonNull." am: 93c5f60c41 am: c6d305022d

Original change: https://android-review.googlesource.com/c/platform/frameworks/opt/net/ethernet/+/1927229

Change-Id: I1ac05f9af8a3f07bcf0c66dfa66ec2dafcc8f74b
tree: a4066c37db8e59f122d88489c06eaddcc6a4505b
  1. service-t/
  2. tests/