Add flag metadata for Crostini

Assigns owners for the following Crostini flags:
crostini-usb-support
disable-crostini-files
enable-experimental-crostini-ui

Bug: 897809
Change-Id: I077743a15cb65e552d38e23f189401193723006f
Reviewed-on: https://chromium-review.googlesource.com/c/1345673
Reviewed-by: Joel Hockey <joelhockey@chromium.org>
Reviewed-by: Nicholas Verne <nverne@chromium.org>
Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Commit-Queue: Josh Pratt <jopra@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611021}
1 file changed