Fix EmergencyCallback in NetworkController

 - Do some cleanup so that things are more testable
 - Test emergency callback since its possible
 - Fix emergency callback in no sims case

Bug: 16218652
Change-Id: Ic859eff732cc11c5ae8aa6ced3584905bbe215c7
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarHeaderView.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarHeaderView.java
index dfc6924..a81f06e2 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarHeaderView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarHeaderView.java
@@ -45,6 +45,7 @@
 import com.android.systemui.qs.QSPanel;
 import com.android.systemui.qs.QSTile;
 import com.android.systemui.statusbar.policy.BatteryController;
+import com.android.systemui.statusbar.policy.NetworkControllerImpl.EmergencyListener;
 import com.android.systemui.statusbar.policy.NextAlarmController;
 import com.android.systemui.statusbar.policy.UserInfoController;
 
@@ -54,7 +55,8 @@
  * The view to manage the header area in the expanded status bar.
  */
 public class StatusBarHeaderView extends RelativeLayout implements View.OnClickListener,
-        BatteryController.BatteryStateChangeCallback, NextAlarmController.NextAlarmChangeCallback {
+        BatteryController.BatteryStateChangeCallback, NextAlarmController.NextAlarmChangeCallback,
+        EmergencyListener {
 
     private boolean mExpanded;
     private boolean mListening;
@@ -527,7 +529,8 @@
         return true;
     }
 
-    public void setShowEmergencyCallsOnly(boolean show) {
+    @Override
+    public void setEmergencyCallsOnly(boolean show) {
         boolean changed = show != mShowEmergencyCallsOnly;
         if (changed) {
             mShowEmergencyCallsOnly = show;