SystemUI: Fix potential NPE

Does already cause issues on some Halo ports to other ROMs.
Might not cause issues on PA (yet), but better safe than sorry.
App sidebar (1/2)

Change-Id: I600a21fd780587ef84c8e1994adbaccc6098254d
App sidebar: floating window

long click to launch app in floating window

Change-Id: I9b5df1cceb2314ee0f8727136c007c481346a264
Fix Lockscreen Notification Button Landscape Layout

Change-Id: I77bd00aed6ced4d2f422801ed22bf1cb5168dc09
Fix Floating window bug

1. any app in recent apps + launch floating app in home screen
2. close floating app
3. last app in recent apps will launch and close in 0.5 sec

Change-Id: I6fa8605b431ae8f82ca6be34a8fc4b9cab407c9a

Conflicts:
	services/java/com/android/server/am/ActivityStack.java
App sidebar: some adjustments

- Cleanup
- fix disappearing appbar on changing appbar position
- may fix endless FC on changing appbar contents

Change-Id: I7667e60878c07b7c722dbd2bd5c2fd69bbbdda78

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
App sidebar: notify if app is not installed

better than force close

Change-Id: I9eebe1a3a4be2dad16ed9a8cff9c0694900d833d

Conflicts:
	packages/SystemUI/res/values/cm_strings.xml
Don't show wallpaper if lockscreen blur is enabled

Change-Id: I986c8aa8c4ed8f6830d40d098f06992480483ee4