Merge "Replace Preconditions.checkNotNull with Objects.requireNonNull." am: 7ab9fb8f1a am: 9316b296b4 am: 2f5bb0a276

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

Change-Id: I0e58504c81a72a60525192156d0609ea1b770001
tree: a4066c37db8e59f122d88489c06eaddcc6a4505b
  1. service-t/
  2. tests/