File list (Check if you may need any files):
app\Activity.java
...\ActivityGroup.java
...\ActivityManager.java
...\AlarmManager.java
...\AlertDialog.java
...\AliasActivity.java
...\Application.java
...\DatePickerDialog.java
...\Dialog.java
...\ExpandableListActivity.java
...\Instrumentation.java
...\IntentService.java
...\KeyguardManager.java
...\LauncherActivity.java
...\ListActivity.java
...\LocalActivityManager.java
...\Notification.java
...\NotificationManager.java
...\PendingIntent.java
...\ProgressDialog.java
...\SearchManager.java
...\Service.java
...\TabActivity.java
...\TimePickerDialog.java
app