Remove ConstructPasswordReuseInfo method;

In this CL, password manager client logic gets cleaned up by removing the ConstructPasswordReuseInfo method. Instead, we initialize the PasswordReuseInfo struct directly. Also, fixed a DCHECK failure and record the combined potential password theft signal in the telemetry service.

Bug: 1351484
Change-Id: I672fbacd3577e34d20d0508e9c88f70b991448ed
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3921964
Reviewed-by: Xinghui Lu <xinghuilu@chromium.org>
Auto-Submit: Zack Han <zackhan@chromium.org>
Commit-Queue: Vasilii Sukhanov <vasilii@chromium.org>
Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1054636}