FRR follow-up: change the data directory

Change the data directory to non-de to unblock the feature from SEPolicy
check and update the data persistence for multi-user.

Bug: 258872351
Bug: 297127449
Bug: 295582896
Test: atest AuthenticationStatsPersisterTest
Change-Id: I041552e7cc23e9454ce6f4009eac03656b0ffff4
3 files changed