kiosk: enable feedback page shortcut

Enable the opening feedback page shortcut when the kiosk
troubleshooting tools are enabled.

BUG=b/283942805
TEST=kiosk device with troubleshooting tools
TEST=unit_tests

Change-Id: Ie58a250fc0b01a62df177fc26cd56744f4cbc7d0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4555698


Commit-Queue: Polina Bondarenko <pbond@chromium.org>
Reviewed-by: Sergii Bykov <sbykov@google.com>
Auto-Submit: Polina Bondarenko <pbond@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1148187}