frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/SignalClusterTextView.java:77: error: cannot find symbol
                    Settings.System.STATUS_BAR_SIGNAL_TEXT), false, this,
                                   ^
  symbol:   variable STATUS_BAR_SIGNAL_TEXT
  location: class System
frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/SignalClusterTextView.java:179: error: cannot find symbol
                Settings.System.STATUS_BAR_SIGNAL_TEXT, SIGNAL_CLUSTER_STYLE_NORMAL, UserHandle.USER_CURRENT));
                               ^
  symbol:   variable STATUS_BAR_SIGNAL_TEXT
  location: class System