Add active display to ChameleonOS [1/2]

This is the ChameleonOS implementation of the active
display feature, similar to that found on the Moto X.

When enabled the screen will turn on and display the
incoming notification.  The user can then open the app
for the notification, dismiss the notification or unlock
their device normally.

Additional notifications, if any exist, will be displayed
below the ring notification and can be viewed by touching
the notification icon.  The user can simply slide their
finger across these other notification to quickly view
them.  The last one touched will remain in the ring and
the user can then perform any of the actions listed above.

PS2-PS12:
All the changes that brought us to this current implementation.

Change-Id: I51c17cec33b65dc60111a10c5ca2c449596ebe63
Correct active display settings naming

Change-Id: Ibfa2d41eed01d8987df52f013b111a0ce4e70739
Active display: Add sunlight mode. [1/2]

Change-Id: I541e74c5a1a7e6ce5028ab00cf998bba1d4fe0f9
Delay hiding systemui by 100ms
When disabling the keyguard, the systemui visibility is
changed and can occur after we hide it so delaying this
a bit resolves that issue.

Change-Id: Iad432f75195983837d643fa38495e6beb54f3e22
Active display: make sure mNotificaiton is set correctly

Change-Id: I4111ca843e340cca4d6dac4b2c2922ce3039e487
Active display: register/unregister recievers and listeners when enabled/disabled

Change-Id: Ic73e63da2c9634bc864ab1a1387eb9145eb0b5b0
Active display: Unify (un)registering callbacks and add proper checks.

Change-Id: Ie4c4660a54d2c60831f7a3bcc66b3a9ca1d035f2
Active display: xxhdpi icons to fix layout