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This change lays a foundation for adding additional functionality to this
page by adding a router for subpanals and a navigation bar (tabs) listing
the one (current) feature.

Bug: 928923
Change-Id: Ia29c27dbf9e8edbf56a84d81818c7ce20ed698d7
Reviewed-on: https://chromium-review.googlesource.com/c/1455268
Commit-Queue: Nancy Li <nancyly@google.com>
Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Reviewed-by: calamity <calamity@chromium.org>
Reviewed-by: Reilly Grant <reillyg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#632044}