* These layouts are necessary for custom activities to inherit from
(those that are integrated into Settings, which is the case of the
several forms of DeviceSettings), in order to keep UI consistency.
In Oreo, all Settings preferences and preference categories
have a margin on the left, reserved for icons.
* Place the layouts here, to avoid cluttering device trees
(plain copy of Google's layouts from Settings app).
Change-Id: Ib3f670b19c7e728b97fd76efe04bcc2f69008b06
