framework: Bring back the status bar activity indicators for mobile data and wifi

* adds a setting for this as well as reverting the following commit:

Reverts "Remove signal/wifi activity indicator icon overlays."

This reverts commit fcc901c.

Change-Id: I7aa85f7c8442c45d17e42cac7823dfe93e3f24c1

Conflicts:

core/java/android/provider/Settings.java

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/src/com/android/systemui/statusbar/policy/NetworkController.java
Statusbar/QS: Mobile and Wifi network icons color, (1/2):

Included:

- Custom mobile network strenght icons color,
  (normal and connected to google servers)
- Custom mobile network type icons,
  (normal and connected to google servers)
- Custom mobile network activity icons color,
  (normal and connected to google servers)
- Custom Wifi network strenght icons color,
  (normal and connected to google servers)
- Custom Wifi network activity icons color,
  (normal and connected to google servers),
  (not available on Quicksettings)

To do:
  - Add activity indicators for Wifi activity, (Quicksettings Tile front)

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/src/com/android/systemui/statusbar/SignalClusterView.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettings.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettingsBasicBackTile.java
Statusbar: Custom airplane mode icon color, (1/2)

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/src/com/android/systemui/statusbar/SignalClusterView.java