Revert "Revert "Generate stable version of NetworkStackStatsLog""

This reverts commit da5f6bb2.

Reason for revert: Revert of a revert. The failure which caused the original revert has been fixed in ag/13536598.

Test: Run failing mainline_qt_boottime_test in Forrest:
go/forrest-run/L37000000812186599

Change-Id: I1cf189ce34905f9ab587a04f9aa198471122489f