Set crostini backup and restore flag enabled by default for M75

Bug: 929733

Change-Id: Ia722a02acb117381e71ee779b843eb9b56ad686d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1512980
Reviewed-by: Nicholas Verne <nverne@chromium.org>
Commit-Queue: Joel Hockey <joelhockey@chromium.org>
Cr-Commit-Position: refs/heads/master@{#639738}
1 file changed