Notificaitons: fix show/hide of show all button

& fix endless SystemUI FC when SystemUI is Killed

Change-Id: I1bcb11ea09979bfe2c72beb260e8e78124c4c86d
Signed-off-by: hany <hany.alsamman@gmail.com>

Conflicts:

	packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java
Notififications: Fix NPE

Change-Id: I8cd547abf384098aa33d53312815f84cd3ee6479
Signed-off-by: hany <hany.alsamman@gmail.com>
Notifications: try to fix occasionally SystemUI FC on boot

Change-Id: If21f3810444919a36a5ad2ce9027c9cfb0c71ba1
Signed-off-by: hany <hany.alsamman@gmail.com>