Make carrier label single line with marquee on overflow

Bug: 15261340
Change-Id: I3b22b018ba834da71129e2ece7107fee5807b1f7
diff --git a/packages/SystemUI/res/layout/status_bar_expanded_header.xml b/packages/SystemUI/res/layout/status_bar_expanded_header.xml
index dfc3b22..7f34041 100644
--- a/packages/SystemUI/res/layout/status_bar_expanded_header.xml
+++ b/packages/SystemUI/res/layout/status_bar_expanded_header.xml
@@ -98,7 +98,8 @@
         android:gravity="center_vertical"
         android:ellipsize="marquee"
         android:textAppearance="?android:attr/textAppearanceSmall"
-        android:textColor="#ffffff" />
+        android:textColor="#ffffff"
+        android:singleLine="true" />
 
     <include
         layout="@layout/quick_settings_brightness_dialog"