Unlimited lockscreen widgets

Change-Id: I1e05978f6476c3771bdfcd9655233e85f56d90d1

Conflicts:
	policy/src/com/android/internal/policy/impl/keyguard/KeyguardHostView.java
Center clock (1/2)
Credit: CyanogenMod gerrit

Change-Id: I80cfef86d556a468925ec22f42dd1638f7c90565

Conflicts:
	packages/SystemUI/res/layout/status_bar.xml
	packages/SystemUI/res/layout/status_bar_expanded_header.xml
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
	packages/SystemUI/src/com/android/systemui/statusbar/policy/Clock.java
	packages/SystemUI/src/com/android/systemui/statusbar/tablet/TabletStatusBar.java
Remove lag when launching an app and improve scrolling