Settings: Add a RemotePreference for device-specific doze settings

 * If a device has its own panel, we should replace the item under
   display settings instead of having to clutter up the dashboard.
 * This uses the new RemotePreference API to allow the external
   app to update the view.
 * The action for this is "org.lineageos.settings.device.DOZE_SETTINGS".

This is squashed with:

Author: Bruno Martins <bgcngm@gmail.com>
Date:   Sun Oct 25 15:20:06 2020 +0000

    Settings: Hide AOD pref is device provides Doze settings

    Devices that provide Doze settings typically implement own AOD pref,
    so hide AOSP one.

    Change-Id: I458de41a1c8e17203374866a0032b33c48690aac

Change-Id: I22fd7e6307b370807415ce2132bed4808b2befe1