[AF] Extend expiry of IBAN flags

The IBAN project is planning to launch across data types and surfaces in
M131, so extending the flag past that.

Fixed: 346617062
Change-Id: I275c38bfa826f91eba27b3f7c3a357d437118866
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5622699


Auto-Submit: Olivia Saul <jsaul@google.com>
Reviewed-by: Vinny Persky <vinnypersky@google.com>
Commit-Queue: Olivia Saul <jsaul@google.com>
Commit-Queue: Vinny Persky <vinnypersky@google.com>
Cr-Commit-Position: refs/heads/main@{#1313707}