Add line break between PLMN and SPN in windowshade.

bug: 2994598
Change-Id: Id588e18e78e0adcc6a0a4e40599f60c57a40170d
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/CarrierLabel.java b/packages/SystemUI/src/com/android/systemui/statusbar/CarrierLabel.java
index d89d093..31b78b6 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/CarrierLabel.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/CarrierLabel.java
@@ -99,7 +99,7 @@
         }
         if (showSpn && spn != null) {
             if (something) {
-                str.append(' ');
+                str.append('\n');
             }
             str.append(spn);
             something = true;