Removed Traffic meter
Add network usage stats to status bar. [1/2]
PS2:
Get the time delta between updates and use that to show
average bytes per second.

Change-Id: I63771220333a32063f675e6fc38c9aadb6de4274

Conflicts:

	core/java/android/provider/Settings.java
	packages/SystemUI/res/layout/status_bar.xml
	packages/SystemUI/res/values/dimens.xml
	packages/SystemUI/res/values/styles.xml
NetStats: Don't update stats when screen is off

Also moved registering of broadcast receiver and settings
observer to onAttachedToWindow() and unregistering to
onDetachedFromWindow() to avoid these being leaked.

Change-Id: Ia131a0db65c4c762b7f28493e812f9fb21358a27
Network stats custom colors (1/2)

Change-Id: I3c95a70273b111c7776f395f7baa60a77cea95dd

Conflicts:

	core/java/android/provider/Settings.java
NetStats: Add net stats to system bar.

PS2:
PS3:
Hide net stats view when notification area is disabled.

Change-Id: Ib35dd46b026dab00abe73966105806c54266e466
Network stats small changes
- change default color;
- show speed in B/s, KB/s and MB/s;
- scale down text size to 9dp;

Change-Id: Ife85c87afba052abe8ae5e60c079680b8046f34e