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

Change-Id: I1858c5265c48b936c831cc9eb2d267f6d28aec28

Conflicts:
	res/values/ck_arrays.xml
	res/values/ck_strings.xml
	res/xml/statusbar_net_speed.xml
	src/com/android/settings/slim/StatusBarNetSpeed.java