follow to kitkat changes their new fixes for active display

pulled from ChOS credit for 0xD34D

follow kitkat changes and fix ActiveDisplay never disabled after using turn off display option

pulled from omni , credit for Squadzone

using another logic to determine, when need to hide Statusbar and Navigationbar
we dont want systemui visibility reset if lockscreen still enable and ActiveDisplay force to Turn Off

Correct ActiveDisplay visibility when launch Ongoing Notifications

fix Back button navbar cant work on some conditions

since AD detect User Activity, we dont want to override UserActivity inside View, so do only if AD visibilty are Gone

also add patch to keyguard, do not reset if ActiveDisplay visibility Visible
taken from Lockscreen Notification by David L.-W <david.leppla.weber@gmail.com>

Change-Id: Ia4c1aa78e0ab2067cc071036cc8723d9e1ccf893

Conflicts:
	packages/Keyguard/src/com/android/keyguard/KeyguardViewMediator.java
	packages/SystemUI/src/com/android/systemui/statusbar/BaseStatusBar.java