Work around DIR_PROGRAM_FILES6432 gets C:\Program Files (x86) on Arm64

This CL works around issue 1448952 that calling `base::PathService::Get`
with `DIR_PROGRAM_FILES6432` gets `C:\Program Files (x86)` instead of
`C:\Program Files` for an `x86` process on `Arm64`.

Bug: 1448952
Change-Id: I79ad9d70d2b2cd8c1726748b970639c1e50307d3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4567072


Auto-Submit: S Ganesh <ganesh@chromium.org>
Reviewed-by: Xiaoling Bao <xiaolingbao@chromium.org>
Commit-Queue: Xiaoling Bao <xiaolingbao@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1149318}