Framework: Port notification drawer custom background (2/2)

Patchset 2
- one small correction

Change-Id: I017bf281426fbf3c5f0525dde81a43bef60c7193

Conflicts:
	packages/SystemUI/res/drawable-hdpi/notification_panel_bg.9.png
	packages/SystemUI/res/drawable-mdpi/notification_panel_bg.9.png
	packages/SystemUI/res/drawable-sw600dp-hdpi/notification_panel_bg.9.png
	packages/SystemUI/res/drawable-sw600dp-mdpi/notification_panel_bg.9.png
	packages/SystemUI/res/drawable-sw600dp-xhdpi/notification_panel_bg.9.png
	packages/SystemUI/res/drawable-xhdpi/notification_panel_bg.9.png
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java