Don't flip image row arrow icon.

The icon already flips itself via FLIPS_ON_RTL, so override the
default behavior of ImageButton and don't flip it.

Fixed: b/365899636
Change-Id: I1bf4b945fbf3bd09509c78c7f0b283df4795bcbb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5850060
Reviewed-by: Michelle Chen <michellegc@google.com>
Auto-Submit: Darren Shen <shend@chromium.org>
Commit-Queue: Darren Shen <shend@chromium.org>
Commit-Queue: Michelle Chen <michellegc@google.com>
Cr-Commit-Position: refs/heads/main@{#1353803}