[UPM] Enable UPM M4 by default

Fixed: 324398132
Change-Id: Ie523e0b5b7b8ea4e179d78c906be4e3e731b2202
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5587750


Commit-Queue: Viktor Semeniuk <vsemeniuk@google.com>
Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1312652}