android: Add |mIsManaged| to ChosenObjectInfo

This change adds a |mIsManaged| boolean to ChosenObjectInfo that is true
if the source of the preference is
content_settings::SETTING_SOURCE_POLICY. This will prepare policy
allowed chosen objects to be displayed properly in the Site Settings UI.

Design doc:
https://docs.google.com/document/d/1MPvsrWiVD_jAC8ELyk8njFpy6j1thfVU5aWT3TCWE8w/edit#heading=h.z7uyjhrr3ac2

Bug: 854329
Change-Id: Iaa943154d8c62587dff0fbdfdb88ceb994d2d564
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1428040
Reviewed-by: Finnur Thorarinsson <finnur@chromium.org>
Reviewed-by: Theresa <twellington@chromium.org>
Commit-Queue: Ovidio de Jesús Ruiz-Henríquez <odejesush@chromium.org>
Cr-Commit-Position: refs/heads/master@{#640325}
3 files changed