SystemUI: Fix signal cluster hiding data icon on data disabled.

 972a6e652 removed the zero'ing of the datatype icon, restore the
 original behavior.

Change-Id: I5794582673b13835d9264d7615d640308bf3fbe3
Themes: Fix memory corruption from closing asset before XMLTree

Change-Id: Ifa411c18d46f4bb6befa18405ce7daa04de13ccc
core: Fix typos in AOSP EN resources

Change-Id: I40220888c2fbe87629d17fc52046e554388de3ee
Only discard the roaming icon if we're not roaming anymore.

  Ignore data roaming toggle because it shouldn't have impact on whether
  we show the indicator or not.

Change-Id: I445c1005a935eaca9d0a132d5a5a7fd214b300d0
Themes: Make notification action text color themeable

Change-Id: If7d61fc904eb016069f608534650ea67df27d0b1