frameworks/base: Battery and Notification Lights

A reworked implementation based on code in the
commits listed further below.

Key changes from the original implementation:

*) Settings observation and most lineage lights
   feature specific code has been moved to the
   lineage-sdk.

*) Battery and notification frameworks services
   call out to the sdk to allow our features
   to make changes to lights values.

Original commits:

Author: DvTonder <david.vantonder@gmail.com>
Author: Ricardo Cerqueira <cyanogenmod@cerqueira.org>
Date:   Mon Nov 4 00:57:51 2013 +0000
Framework: Port CM9 features to CM10
Change-Id: Ibd63116df90b06f6ce6adb8a0343059bbb999bfb

Author: Pawit Pornkitprasan <p.pawit@gmail.com>
Date:   Sun Dec 8 15:24:41 2013 +0700
BatteryService: fix FC on boot until battery stat is present
updateLightsLocked() can be called from CM's added SettingsObserver
when battery stat is not present, causing an FC and a loop until
battery stat is present.
Change-Id: Ic4438fe50e98f1aa05ae1d0d26240bf9410fd92f

Author: Sam Mortimer <sam@mortimer.me.uk>
Date:   Tue Dec 31 16:22:05 2013 -0800
[2/2] Framework: instant led test
Adds support a new notification extra boolean
EXTRA_FORCE_SHOW_LIGHTS.  Used by settings
notification light picker to force lights on
when the screen is on.
Change-Id: If0a42d32b28fe8c02ef5f7dd148db7eb478fac17

Author: Michael Bestas <mikeioannina@gmail.com>
Date:   Mon Aug 18 04:56:28 2014 +0300
Add support for single color notification LED (1/2)
Change-Id: I367af77036da9e87c6dd0df552ce4c56d945a44d

Author: Danesh M <daneshm90@gmail.com>
Date:   Thu, 12 Nov 2015 10:52:11 -0800
Framework : Move System settings to CMSettings
Change-Id: I4e9fb06db7b9ba05e4a7bbe11916bb2271af4727

Author: Adnan Begovic <adnan@cyngn.com>
Date:   Mon, 9 Nov 2015 16:26:00 -0800
fw: Move battery light settings to CMSettings.
Change-Id: I28e60473356b2a9af152df82d34ad7abc9918682

Author: Steve Kondik <steve@cyngn.com>
Date:   Thu Sep 24 11:27:59 2015 -0700
lights: Automatically generate an LED color for notifications
Change-Id: I7288e52499819a6a6c75ed9d9ba7cfa1b13c5669
nms: Only generate LED colors if the device has a multicolored LED
* Check the overlay value before doing any of this stuff.
Change-Id: Iedfceba6bfc86b2761d8af57ecab51026bfa4c19
Change-Id: I7288e52499819a6a6c75ed9d9ba7cfa1b13c5669

Author: Adrian DC <radian.dc@gmail.com>
Date:   Sat Oct 14 23:08:47 2017 +0200
fw: Rebrand to LineageOS and cleanup for Android Oreo
Change-Id: I21d424433bb52a17eea7974c4ea29a3a16fe1be5

Author: AdrianDC <radian.dc@gmail.com>
Date:   Sat Jul 18 12:20:51 2015 +0200
Lights with Screen On [1/2]: Optional allowment of lights
Change-Id: I2071147d8ddab80ba0e1e7310e785ac3e03b3c7c
Lights with screen on: Don't disable leds after the lockscreen
Change-Id: If8f5b867a34be09fb061bb7ad040b16730f4e263
Framework : Move System settings to CMSettings
Change-Id: I4e9fb06db7b9ba05e4a7bbe11916bb2271af4727
fw: Rebrand to LineageOS and port for Android Oreo
Change-Id: I65cfeb659fe516ef43aa84b1c6d2eb6876df202a
Change-Id: If8f5b867a34be09fb061bb7ad040b16730f4e263

Author: Michael W <baddaemon87@gmail.com>
Date:   Mon Oct 9 22:04:00 2017 +0200
Core: Battery warning levels are inclusive, not exclusive
Change-Id: Ib35b154b6117f7e26b4a3a5aee9254dda3adda12

Author: Adrian DC <radian.dc@gmail.com>
Date:   Sat Oct 14 23:08:47 2017 +0200
fw: Rebrand to LineageOS and cleanup for Android Oreo
Change-Id: I845f866891386aee808a4e7e80f4ab7c3ad48830

Author: Sam Mortimer <sam@mortimer.me.uk>
Date:   Tue Nov 21 23:18:16 2017 -0800
frameworks/base: Improve interface to LineageNotificationLights
Change-Id: I43af52dd236e802d232a4cf96ccd6f69af6b26b7

Author: Sam Mortimer <sam@mortimer.me.uk>
Date:   Wed Dec 13 11:54:23 2017 -0800
frameworks/base: prevent lights service calls when battery led does not exist
Change-Id: I9eefff1f587c978c0aa2b31d03e664dc7ccf42de

Author: Sam Mortimer <sam@mortimer.me.uk>
Date:   Fri Feb 9 14:04:35 2018 -0800
frameworks/base: disable warning about mLineageBatteryLights not being ready
Change-Id: I96852f83a739924ac47260de511ddbea81465c52

Change-Id: I564fdb6ca6c5bbcf890afa4b9a2f9fa7bf8b9604