Adding Launcher Mode settings to Launcher settings

Bug: 364711735
Test: NA
Flag: com.android.launcher3.one_grid_specs
Change-Id: Iab688ebdb8449f9258b61f59a0afe97875f82a81
diff --git a/src/com/android/launcher3/LauncherFiles.java b/src/com/android/launcher3/LauncherFiles.java
index 95c0ee8..df75470 100644
--- a/src/com/android/launcher3/LauncherFiles.java
+++ b/src/com/android/launcher3/LauncherFiles.java
@@ -24,6 +24,7 @@
     public static final String LAUNCHER_4_BY_4_DB = "launcher_4_by_4.db";
     public static final String LAUNCHER_3_BY_3_DB = "launcher_3_by_3.db";
     public static final String LAUNCHER_2_BY_2_DB = "launcher_2_by_2.db";
+    public static final String LAUNCHER_7_BY_3_DB = "launcher_7_by_3.db";
     public static final String BACKUP_DB = "backup.db";
     public static final String SHARED_PREFERENCES_KEY = "com.android.launcher3.prefs";
     public static final String MANAGED_USER_PREFERENCES_KEY =
@@ -43,7 +44,8 @@
             LAUNCHER_5_BY_6_DB,
             LAUNCHER_4_BY_4_DB,
             LAUNCHER_3_BY_3_DB,
-            LAUNCHER_2_BY_2_DB));
+            LAUNCHER_2_BY_2_DB,
+            LAUNCHER_7_BY_3_DB));
 
     public static final List<String> OTHER_FILES = Collections.unmodifiableList(Arrays.asList(
             BACKUP_DB,