Merge "Address review followup comments for NetworkStats" into main am: 8df4d76aa2 am: 63b9d4a04c

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

Change-Id: I99b05c6180d4656f47b2b6743ed1cff10a34236c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>