Roll src/third_party/libaom/source/libaom/ 31317a021..34e6f6e87 (1 commit)

https://aomedia.googlesource.com/aom.git/+log/31317a021296..34e6f6e87a9a

$ git log 31317a021..34e6f6e87 --date=short --no-merges --format='%ad %ae %s'
2025-05-20 marpan Make ROI work for rtc, add tests

Created with:
  roll-dep src/third_party/libaom/source/libaom
R=jzern@google.com,vigneshv@google.com

Bug: b:307414544
Change-Id: Id73dc888172957c39536da32647da2f035bbe633
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6607809
Auto-Submit: Wan-Teh Chang <wtc@google.com>
Commit-Queue: Wan-Teh Chang <wtc@google.com>
Commit-Queue: James Zern <jzern@google.com>
Reviewed-by: James Zern <jzern@google.com>
Cr-Commit-Position: refs/heads/main@{#1467661}