[App Management] Add Chrome App Permission Mapping

This CL makes chrome app permission view display the actual permissions
strings in an unordered list by fetching permission messages from
extension registry.

Bug: 906508
Change-Id: If936131faa4f622ea98d42208f0fa5a90c469ec7
Reviewed-on: https://chromium-review.googlesource.com/c/1404539
Reviewed-by: Eric Willigers <ericwilligers@chromium.org>
Reviewed-by: calamity <calamity@chromium.org>
Reviewed-by: Dominick Ng <dominickn@chromium.org>
Commit-Queue: Cecilia Ni <ceciliani@google.com>
Cr-Commit-Position: refs/heads/master@{#622744}
11 files changed