Revert "Bring back the status bar activity indicators for mobile data and wifi"

This reverts commit acda2b08daf18120b759276c06300e50902c0034.

Conflicts:

	core/java/android/provider/Settings.java
	packages/SystemUI/res/drawable-ldrtl-xhdpi/stat_sys_signal_in.png
	packages/SystemUI/res/drawable-ldrtl-xhdpi/stat_sys_signal_inout.png
	packages/SystemUI/res/drawable-ldrtl-xhdpi/stat_sys_signal_out.png
	packages/SystemUI/res/drawable-ldrtl-xxhdpi/stat_sys_signal_in.png
	packages/SystemUI/res/drawable-ldrtl-xxhdpi/stat_sys_signal_inout.png
	packages/SystemUI/res/drawable-ldrtl-xxhdpi/stat_sys_signal_out.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_signal_in.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_signal_inout.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_signal_out.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_wifi_in.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_wifi_inout.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_wifi_out.png
	packages/SystemUI/res/drawable-xxhdpi/stat_sys_signal_in.png
	packages/SystemUI/res/drawable-xxhdpi/stat_sys_signal_inout.png
	packages/SystemUI/res/drawable-xxhdpi/stat_sys_signal_out.png
	packages/SystemUI/res/drawable-xxhdpi/stat_sys_wifi_in.png
	packages/SystemUI/res/drawable-xxhdpi/stat_sys_wifi_inout.png
	packages/SystemUI/res/drawable-xxhdpi/stat_sys_wifi_out.png
	packages/SystemUI/src/com/android/systemui/statusbar/policy/NetworkController.java