Update carrier text when phone service state is changed

The carrier text is not updated when the phone service state has
changed. To solve this issue, the EmergencyCryptkeeperText view should
receive the KeyguardUpdateMonitorCallback#onRefreshCarrierInfo().

Bug: 37331677
Test: visual

Change-Id: I359991688552b731eaa02f443902eb7bdc894d10
(cherry picked from commit 76c36c4dc5eb2195c918590b23c16f6410a52df0)
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/policy/EmergencyCryptkeeperText.java b/packages/SystemUI/src/com/android/systemui/statusbar/policy/EmergencyCryptkeeperText.java
index a2d1baf..c726189 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/policy/EmergencyCryptkeeperText.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/policy/EmergencyCryptkeeperText.java
@@ -47,6 +47,11 @@
         public void onPhoneStateChanged(int phoneState) {
             update();
         }
+
+        @Override
+        public void onRefreshCarrierInfo() {
+            update();
+        }
     };
     private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
         @Override