keyboard: re-add code to detect lid state and handle lights

Depends on libhardware patch for the light ids:
http://review.cyanogenmod.org/77944

This squashes the following commits from cm-11.0 and updates
them for cm-12.0:

From: Dave Daynard <nardholio@gmail.com>
Date: Tue, 19 Nov 2013 18:22:45 -0500
Subject: keyboard: re-add code to detect lid state

keyboard: re-add code to detect lid state

This was lost in the cm-11 merge. Without this, a change in lid state
isn't generated to light up the keyboard backlight

Change-Id: Ief35cebcb62da13afe1ae7531d69ab58e196be9e

From: YuanQY <yuanqingyun@gmail.com>
Date: Fri, 8 Feb 2013 10:59:22 +0800
Subject: Keyboard light: Fix the physical keyboard not light when

Keyboard light: Fix the physical keyboard not light when it's visiable.

Change-Id: I595afd3cb6b422a17ae0f6ec20aa51979db13810

From: tbalden <illespal@gmail.com>
Date: Sun, 31 Mar 2013 18:33:53 +0200
Subject: keyboard: adding functional alt/shift lights

keyboard: adding functional alt/shift lights

This is useful for devices that has QWERTY keyboard
and leds for the Alt/Shift (Fn/Caps) keys, like
htc doubleshot.

Change-Id: I66ebc2d881438f5b51db77eaa885421e65a7da0d

Signed-off-by: artas182x <artas182x@gmail.com>
Fix up 'clear recents' UX.

Use the 'dismiss all' button drawable and place the button in the upper
right corner. Doing so fixes the broken animation when going into
recents.

Change-Id: I497a8b023f1872c5f9ae5df87af6ed2159e6b7b1

Signed-off-by: artas182x <artas182x@gmail.com>
display: Don't enable keyboard lights when dozing

Change-Id: Ifd2e490da0af564315aa3c07002cb045377b78cd

Signed-off-by: artas182x <artas182x@gmail.com>
Add PowerManager integration for button and keyboard backlight.

Allows setting button and keyboard backlight brightness as well as
button timeout.

Change-Id: I550cccafc0a8f90d6347de9261adb26b75955cc4

Signed-off-by: artas182x <artas182x@gmail.com>