Make the Crostini Terminal harder to search for

This CL only triggers with the AppServiceAsh feature enabled, and
matches the existing behavior with the feature disabled.

BUG=826982

Change-Id: Iff2e6cd57361e88cc5daad810ab8c24c15b25a93
Reviewed-on: https://chromium-review.googlesource.com/c/1474876
Reviewed-by: calamity <calamity@chromium.org>
Commit-Queue: Nigel Tao <nigeltao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#633505}
1 file changed