Rename the binder call createActivityContainer

Change the call to createVirtualActivityContainer to better describe what's
actually being created with the call.

Change-Id: Id3a32df19a5bb6740cbabcd65897349e9f2f2946
diff --git a/services/core/java/com/android/server/am/ActivityManagerService.java b/services/core/java/com/android/server/am/ActivityManagerService.java
index 3be3cf1..0c04418 100755
--- a/services/core/java/com/android/server/am/ActivityManagerService.java
+++ b/services/core/java/com/android/server/am/ActivityManagerService.java
@@ -8604,7 +8604,7 @@
     }
 
     @Override
-    public IActivityContainer createActivityContainer(IBinder parentActivityToken,
+    public IActivityContainer createVirtualActivityContainer(IBinder parentActivityToken,
             IActivityContainerCallback callback) throws RemoteException {
         enforceCallingPermission(android.Manifest.permission.MANAGE_ACTIVITY_STACKS,
                 "createActivityContainer()");
@@ -8619,7 +8619,7 @@
             if (callback == null) {
                 throw new IllegalArgumentException("callback must not be null");
             }
-            return mStackSupervisor.createActivityContainer(r, callback);
+            return mStackSupervisor.createVirtualActivityContainer(r, callback);
         }
     }
 
diff --git a/services/core/java/com/android/server/am/ActivityStackSupervisor.java b/services/core/java/com/android/server/am/ActivityStackSupervisor.java
index a612575..3227efa 100644
--- a/services/core/java/com/android/server/am/ActivityStackSupervisor.java
+++ b/services/core/java/com/android/server/am/ActivityStackSupervisor.java
@@ -2546,7 +2546,7 @@
         return null;
     }
 
-    ActivityContainer createActivityContainer(ActivityRecord parentActivity,
+    ActivityContainer createVirtualActivityContainer(ActivityRecord parentActivity,
             IActivityContainerCallback callback) {
         ActivityContainer activityContainer =
                 new VirtualActivityContainer(parentActivity, callback);