Create a central list of files the Launcher writes to the app directory

Replace hardcoded Launcher filenames with the defined constants.

Bug: 12753154
Change-Id: I072f202d9388a703b9e6851bde64ea7fafe4b10a
diff --git a/src/com/android/launcher3/LauncherProvider.java b/src/com/android/launcher3/LauncherProvider.java
index c0e6487..4b27837 100644
--- a/src/com/android/launcher3/LauncherProvider.java
+++ b/src/com/android/launcher3/LauncherProvider.java
@@ -73,8 +73,6 @@
     private static final String TAG = "Launcher.LauncherProvider";
     private static final boolean LOGD = false;
 
-    private static final String DATABASE_NAME = "launcher.db";
-
     private static final int DATABASE_VERSION = 20;
 
     static final String OLD_AUTHORITY = "com.android.launcher2.settings";
@@ -431,7 +429,7 @@
         private boolean mNewDbCreated = false;
 
         DatabaseHelper(Context context) {
-            super(context, DATABASE_NAME, null, DATABASE_VERSION);
+            super(context, LauncherFiles.LAUNCHER_DB, null, DATABASE_VERSION);
             mContext = context;
             mPackageManager = context.getPackageManager();
             mAppWidgetHost = new AppWidgetHost(context, Launcher.APPWIDGET_HOST_ID);