Fix wrong dumpsys header for activity containers

Change the header from "STARTER" to "CONTAINERS"

Bug: 135614073
Test: Check the command : adb shell dumpsys activity containers
Change-Id: I8e16299e3ef72454d460824529bcab8d1be58cdb
diff --git a/services/core/java/com/android/server/wm/ActivityTaskManagerService.java b/services/core/java/com/android/server/wm/ActivityTaskManagerService.java
index 971a24d..ed7790c 100644
--- a/services/core/java/com/android/server/wm/ActivityTaskManagerService.java
+++ b/services/core/java/com/android/server/wm/ActivityTaskManagerService.java
@@ -4912,7 +4912,7 @@
     }
 
     void dumpActivityContainersLocked(PrintWriter pw) {
-        pw.println("ACTIVITY MANAGER STARTER (dumpsys activity containers)");
+        pw.println("ACTIVITY MANAGER CONTAINERS (dumpsys activity containers)");
         mRootActivityContainer.dumpChildrenNames(pw, " ");
         pw.println(" ");
     }