FW: LS Notifications: Add "Show all notif" NavBar Button

from: https://github.com/AOSPAL/android_frameworks_base/commit/4325a110af58e6b1c7e1005a9f1f2576bbad5e60

PS2: message & Author update
PS3: Rebased & remove unrelated changes

Change-Id: I67456db4f9728fefbabc9da9c290d070021705b4

Conflicts:

	packages/Keyguard/src/com/android/keyguard/KeyguardViewMediator.java
	packages/SystemUI/res/layout/navigation_bar.xml
	packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java