SystemUI: Add LiveDisplay tile

Author: Steve Kondik <steve@cyngn.com>
Date:   Sun Nov 5 16:37:52 2017 +0100

    SystemUI: LiveDisplay tile

    Change-Id: I53d492e5cb9998268104d5750705aa5ed55d9658
Signed-off-by: Joey Rizzoli <joey@lineageos.org>

Author: Unpublished <unpublished@gmx.net>
Date:   Fri Dec 29 23:00:01 2017 +0100

    livedisplay: Allow tile creation before boot completed phase [2/2]

    Change-Id: Ibef44d4e07da9baf296796515288c9d42aba8608

Author: Michael Bestas <mkbestas@lineageos.org>
Date:   Thu Feb 1 16:39:16 2018 +0000
Edit:   Refactor for Oreo

Change-Id: Ibef44d4e07da9baf296796515288c9d42aba8608

Author: Bruno Martins <bgcngm@gmail.com>
Date:   Thu Feb 1 17:01:43 2018 +0000

    LiveDisplayTile: Avoid NPE during boot up phase

     * During boot, with LineageHW not yet initialized there is no way to
       check the current LiveDisplay mode. In such cases, fallback to AUTO.

    Change-Id: Ifc004c86dfd68f73b8a362a1c833cbc3e7397811

Author: Han Wang <416810799@qq.com>
Date:   Tue Jun 4 18:03:59 2019 +0200

    LiveDisplayTile: Report unavailable on HWC2

    Change-Id: Ic10381e25046a2338bc6bda36ecbb5d5cefc1ab8

Change-Id: I188df4f401e506db355ad8bb4b5307a8d0c3c35b