[FilesTrash] Add CopyOrMoveIOTask constructor to take file names

When restoring files from Trash the file name to move the file to must
be extracted from the parsed .trashinfo file. This may be different to
the on-disk file name.

This adds a new constructor to enable explicitly passing the destination
file names required for the move operation. These are 1:1 mapping to the
source URLs.

Bug: b:243878826
Test: unit_tests --gtest_filter=*CopyOrMoveIOTask*
Change-Id: Id95e195ccdb1cecdbc2be02262f32e6144db6499
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3859204
Commit-Queue: Ben Reich <benreich@chromium.org>
Reviewed-by: Luciano Pacheco <lucmult@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1040370}