Squashed settings part of Traffic Meter

Change-Id: Ic38acc44c915897e28e77a7f68a63ea365f8cd74
Add network usage stats to status bar [2/2]

Change-Id: I1858c5265c48b936c831cc9eb2d267f6d28aec28
Meld NetStats and Traffic meter together to one preference category

Change-Id: Iea41779cebfa8435feb6bff3c985369b96cd8028