[1/2] TrafficMeter: added option for auto-hiding on inactivity

Together with inactivity threshold

Thanks to @C3C0 for the code

Conflicts:
	core/java/android/provider/Settings.java
QuickSwipe: swipe anywhere to flip
Merge branch 'kk' of github.com:SimpleAOSP/android_frameworks_base into kk
Merge branch 'kk' of github.com:SimpleAOSP/android_frameworks_base into kk