cros: Split AppListSearchQueryLength by clamshell and tablet mode

Bug: 953525
Change-Id: I3541430056b9924d9d249f4c6329c249b74bb172
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1574610
Commit-Queue: Matthew Mourgos <mmourgos@chromium.org>
Reviewed-by: Alex Newcomer <newcomer@chromium.org>
Reviewed-by: Steven Holte <holte@chromium.org>
Cr-Commit-Position: refs/heads/master@{#653502}
3 files changed