Merge "Address review followup comments for NetworkStats" into main am: 8df4d76aa2

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2723093

Change-Id: I0a517bfebe79a8a5b69cb726b5a9200bc669685a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>