Quick Settings: Add Network mode tile (part 2 of 2)

This commit also inlcudes a bit of code cleanup and sets the
default tiles to AOSP defaults

Change-Id: I735878997a807450368641faad52ba4b5e8eadf5

Conflicts:

	res/values/strings.xml
	res/xml/quick_settings_panel_settings.xml
	src/com/android/settings/cyanogenmod/QuickSettings.java
	src/com/android/settings/cyanogenmod/QuickSettingsUtil.java