Lockscreen notifications: Add "show all notifications" navbar button

Change-Id: I0cd5b13e5644de36d24d4d693838bd7080f55412

Conflicts:
	packages/Keyguard/src/com/android/keyguard/KeyguardViewMediator.java

Conflicts:
	packages/Keyguard/src/com/android/keyguard/KeyguardViewMediator.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarTransitions.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java
Lockscreen Notifications: dismiss all button, improve animations, cleanup

Change-Id: I77665e37d823c619680312b73d5ebb1e6e437ffd

Conflicts:
	core/java/com/android/internal/statusbar/IStatusBarService.aidl

Conflicts:
	core/java/com/android/internal/statusbar/IStatusBar.aidl
	packages/Keyguard/src/com/android/keyguard/NotificationViewManager.java
	packages/SystemUI/src/com/android/systemui/statusbar/CommandQueue.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java
Lockscreen Notifications: some fixes

Conflicts:
	core/java/android/provider/Settings.java

Change-Id: I9388bcb899080cc023c146a083e554dcf8e57858
Lockscreen Notifications: fix show/hide of show all button

Change-Id: I3f17e91a619467426180813f8fe81d6f4514ab5b

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java
Keyguard: LN: fix and harden against null pointer exceptions

Change-Id: Iff66791bb35b911e837b0a1747a72effdce507e3

Conflicts:
	packages/Keyguard/src/com/android/keyguard/KeyguardViewManager.java