TaskStackBuilder - use the correct package for looking up parents

Fix bug 7179104

Change-Id: Ia5d2d285cf22e97c452e0c385ef38c8bce330491

Author: adamp

core/java/android/app/TaskStackBuilder.java

@@ -162,7 +162,7 @@ public TaskStackBuilder addParentStack(ComponentName sourceActivityName) {
             ActivityInfo info = pm.getActivityInfo(sourceActivityName, 0);
             String parentActivity = info.parentActivityName;
             while (parentActivity != null) {
-                final ComponentName target = new ComponentName(mSourceContext, parentActivity);
+                final ComponentName target = new ComponentName(info.packageName, parentActivity);
                 info = pm.getActivityInfo(target, 0);
                 parentActivity = info.parentActivityName;
                 final Intent parent = parentActivity == null && insertAt == 0