Merge "[MS59.1] Add NetworkStatsDataMigrationUtils" am: c428b10a74 am: a5beb8b8f9 am: b7a3ae056c

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1951480

Change-Id: Iebc807ae214159ec696a2ebbb037bbe7234f9e88