Revert "Avoid layout passes when updating data activity indicators."

This reverts commit 42837a5375af2fbd901f993832bc75ae0c955f3e.

Conflicts:

	packages/SystemUI/res/drawable-xhdpi/stat_sys_signal_noinout.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_wifi_noinout.png
	packages/SystemUI/res/drawable-xxhdpi/stat_sys_signal_noinout.png
	packages/SystemUI/res/drawable-xxhdpi/stat_sys_wifi_noinout.png