Roll Arm AFDO from 125.0.6392.0_rc-r1-merged to 125.0.6400.0_rc-r2-merged

This CL may cause a small binary size increase, roughly proportional
to how long it's been since our last AFDO profile roll. For larger
increases (around or exceeding 100KB), please file go/crostc-bug.

Please note that, despite rolling to chrome/android, this profile is
used for both Linux and Android.

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/afdo-arm-chromium
Please CC c-compiler-chrome@google.com,mobiletc-prebuild@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Chromium Main: 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

Tbr: mobiletc-prebuild@google.com
Change-Id: I787bb4731673966afd9e06c2c13d563f15f7ed0c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5428143
Bot-Commit: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1283177}