Update the color of the expandable volume panel icon

This still retains the old settings icon since it
happens to fit perfectly. Pressing it does indeed
show you a bunch of sliders like the icon indicates.

Also add xhdpi and xxhdpi versions.

Change-Id: I944a325c8871e1afc9d7163b0f23f7f9d8ae070a
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

Conflicts:

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