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Launch_service will be integrated to AppService, and launch_service will
be removed. So modify related components to use app_service/launch_utils.

BUG=1061843

Change-Id: If767a4e91e50cdbc0ec0e5805b88f979a0acfcab
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2115856Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Istiaque Ahmed <lazyboy@chromium.org>
Reviewed-by: Dominick Ng <dominickn@chromium.org>
Commit-Queue: Nancy Wang <nancylingwang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#753115}