[MS82.1] Support network stats data migration process am: a388d4bf06

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2063916

Change-Id: I38284525fff5fd0ac10df9332ee4d91aaed546f6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>