Roll PDFium from 4b608cc6995d to bfa3a7cf2cf6 (2 revisions)

https://pdfium.googlesource.com/pdfium.git/+log/4b608cc6995d..bfa3a7cf2cf6

2024-03-09 ssmole@microsoft.com Gate GDI APIs behind IsUser32AndGdi32Available in cfgas_fontmgr.cpp
2024-03-08 thestig@chromium.org Roll abseil, build, buildtools, clang, and partition_allocator

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/pdfium-autoroll
Please CC dhoss@chromium.org,pdfium-deps-rolls@chromium.org,thestig@chromium.org on the revert to ensure that a human
is aware of the problem.

To file a bug in PDFium: https://bugs.chromium.org/p/pdfium/issues/entry
To file a bug in Chromium: https://bugs.chromium.org/p/chromium/issues/entry

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Bug: None
Tbr: pdfium-deps-rolls@chromium.org
Change-Id: I8d8974c0509ee6488092556a3726c87ee9e08723
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5358082
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Bot-Commit: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1270659}