Lockscreen Notifications: dismiss all button, improve animations, cleanup

Conflicts:
	core/java/com/android/internal/statusbar/IStatusBar.aidl
	packages/Keyguard/src/com/android/keyguard/NotificationHostView.java
	packages/SystemUI/src/com/android/systemui/statusbar/CommandQueue.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java
Lockscreen Notifications: fix show/hide of show all button

& fix endless SystemUI FC when SystemUI is killed
Lockscreen Notifications: fix NPE
Lockscreen Notifications: try to fix occasionally SystemUI FC on boot
Lockscreen Notifications: fix FC when an expanded notification gets reposted without bigContentView
Lockscreen Notifications: some fixes

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