Add an App.installed_internally Mojo field

BUG=826982

Change-Id: I4455af108d301de251baac0877524fcc2499ac00
Reviewed-on: https://chromium-review.googlesource.com/c/1377955
Reviewed-by: calamity <calamity@chromium.org>
Reviewed-by: Dominick Ng <dominickn@chromium.org>
Commit-Queue: Nigel Tao <nigeltao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#623021}
8 files changed