[FilesTrash] Plumb XfNudge and NudgeContainer to work on first trash

Now that the XfNudge and NudgeContainer are all landed. This plumbs
through the NudgeContainer and XfNudge to work when a user first sends
an item to their trash. An integration test has been added, however, I
have added functionality to disable the expiration date validation
(this is tested in a unit test, so to avoid flaky tests that will start
failing around this time, remove expiration all together).

Note: Approved UX strings here http://shortn/_0WkvWvwzmb

Bug: b:245854322
Test: browser_test --gtest_filter=*trashNudgeShownOnFirstTrashOperation*
Change-Id: I347b56d896caa000b15b76d78865aa6b0195d8ae
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3924427
Reviewed-by: Luciano Pacheco <lucmult@chromium.org>
Commit-Queue: Ben Reich <benreich@chromium.org>
Reviewed-by: Wenbo Jie <wenbojie@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1056818}