Notification:  Lockscreen Notifications: dismiss all button, improve animations, cleanup

Change-Id: Ia8ac73e2753d61a2856c5cee8d38e3a090a0e73d

Conflicts:
	core/java/com/android/internal/statusbar/IStatusBar.aidl
	packages/Keyguard/src/com/android/keyguard/KeyguardViewManager.java
	packages/SystemUI/res/layout-sw600dp/navigation_bar.xml
	packages/SystemUI/res/layout/navigation_bar.xml
	packages/SystemUI/src/com/android/systemui/statusbar/CommandQueue.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/KeyguardTouchDelegate.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java