Dynamic Color Changer Tile [2/2]

Change-Id: I298d355e98acf5fb2763353397999df5e8b0cf18

Conflicts:
	res/values/custom_strings.xml
	src/com/android/settings/slim/quicksettings/QuickSettingsUtil.java
Set traffic indicator to white

Change-Id: I486947b0afb97fcae21c5b8d661bf7f1bc062d7f
fix: Settings FC when WiFi tethering is active.

* When filling the 'connected devices' list the function in charge of this
  assumes that the activity for which a 'new preference' is being alloc-
  cated for still exists.
* This is sometimes not the case when an user decides to navigate back to
  the 'Tethering & portable hotspot' settings menu.
* In this case the function will try to allocate a new preference for an
  activity == NULL and lead to a Settings FC.

  Logcat showing the FC: https://gist.github.com/myzb/765d03172078a7657fb0

Change-Id: I34dcafe9286443220867399f22dccb75a4b40d38