Add more Launcher files to delete on Clear Launcher Data

Bug: 12753154
Change-Id: I00679bdc6eff70a1398122aaa955c08eabd556b1
diff --git a/src/com/android/launcher3/LauncherAppState.java b/src/com/android/launcher3/LauncherAppState.java
index 246278f..893d49f 100644
--- a/src/com/android/launcher3/LauncherAppState.java
+++ b/src/com/android/launcher3/LauncherAppState.java
@@ -36,7 +36,6 @@
 
 public class LauncherAppState implements DeviceProfile.DeviceProfileCallbacks {
     private static final String TAG = "LauncherAppState";
-    private static final String SHARED_PREFERENCES_KEY = "com.android.launcher3.prefs";
 
     private static final boolean DEBUG = false;
 
@@ -186,7 +185,7 @@
     }
 
     public static String getSharedPreferencesKey() {
-        return SHARED_PREFERENCES_KEY;
+        return LauncherFiles.SHARED_PREFERENCES_KEY;
     }
 
     DeviceProfile initDynamicGrid(Context context, int minWidth, int minHeight,