Traffic meter enhance coding style

- Consolidate code;
- Move all traffic meter options to one commom class;
- Recoding color and reset color features;
- Some other changes and a clean up in status_bar.xml;

Change-Id: I3f36b580d3173928e2bbeee27d9eb05967ef4893

Conflicts:

	AndroidManifest.xml
	res/values/cr_strings.xml
	res/xml/status_bar.xml
	res/xml/status_bar_traffic_style.xml
	src/com/android/settings/cyanogenmod/StatusBar.java
	src/com/android/settings/cyanogenmod/StatusBarTrafficStyle.java