Change re-auth opt-in bubble strings as per new UX alignment

This CL updates the re-auth opt-in bubble strings as per the new UX
alignment. It is required for launching risk-based authentication for
masked server cards.

Desktop opt-in bubble mock: https://screenshot.googleplex.com/xZRpmHrFaBBHgTD
Implementation: go/strpic/77192483c9b9849a8a7f6e90d4d597fdc23e0c04

Desktop settings page mock: go/strpic/afc9f02cc589a53c3b07c55ad3a14f8e9bba3688
Implementation: https://screenshot.googleplex.com/eK8EsqhU3yD2Mbt

Clank opt-in bottom sheet implementation (no mock available): https://screenshot.googleplex.com/8qYEewnfR4ufLcK

Clank settings page implementation (no mock available, emulator doesn't support re-auth so it's disabled in the screenshot): https://screenshot.googleplex.com/5ykYtDTDfQgET3x

Bug: 327485854
Change-Id: Ic43d6340c386e116d7bd912c90bb77f911d49b96
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5331185


Commit-Queue: Vinny Persky <vinnypersky@google.com>
Reviewed-by: Olivia Saul <jsaul@google.com>
Reviewed-by: Vishwas Uppoor <vishwasuppoor@google.com>
Cr-Commit-Position: refs/heads/main@{#1267193}