Send DANGEROUS_DOWNLOAD_OPENED reports when the warning is already bypassed.

The trigger condition of DANGEROUS_DOWNLOAD_OPENED is "sent when an
SBER/ESB-enabled user decides to execute a file that Chrome showed a
warning for." It is possible that when the download is opened, the
danger type of the download item is DOWNLOAD_DANGER_TYPE_USER_VALIDATED.
We should send the report in this case.

Bug: 1358262
Change-Id: Ifc39f407d8ea416568b0d9c9e57e6e61141486fd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3885755


Reviewed-by: Rohit Bhatia <bhatiarohit@google.com>
Commit-Queue: Xinghui Lu <xinghuilu@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1045351}