Add network usage stats to status bar [1/2]

Conflicts:

	packages/SystemUI/res/layout/status_bar_center_clock.xml
	packages/SystemUI/res/values/vendor_dimens.xml
	packages/SystemUI/res/values/vendor_styles.xml

Change-Id: I7c64a81167d0fea1ccd0adc9ed41e38fc07a79b7
implement app sidebar

Change-Id: I296059a3cc688a567e7e90cccfdf4b8e824cfedf