Framework: add App Sidebar (1/2)

Change-Id: I296059a3cc688a567e7e90cccfdf4b8e824cfedf

Conflicts:

	packages/SystemUI/res/values/vendor_styles.xml
	packages/SystemUI/src/com/android/systemui/statusbar/BaseStatusBar.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java

Conflicts:
	core/java/android/provider/Settings.java
	packages/Keyguard/res/values-sw540dp-port/dimens.xml
	packages/SystemUI/AndroidManifest.xml
	packages/SystemUI/res/values/mahdi_dimens.xml
	packages/SystemUI/res/values/mahdi_strings.xml
	packages/SystemUI/res/values/mahdi_styles.xml
	packages/SystemUI/src/com/android/systemui/statusbar/BaseStatusBar.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java