Adding Launcher Mode settings to Launcher settings

Bug: 364711735
Test: NA
Flag: com.android.launcher3.one_grid_specs
Change-Id: Iab688ebdb8449f9258b61f59a0afe97875f82a81
diff --git a/res/xml/backupscheme.xml b/res/xml/backupscheme.xml
index 58916a8..34b80b1 100644
--- a/res/xml/backupscheme.xml
+++ b/res/xml/backupscheme.xml
@@ -10,6 +10,7 @@
     <include domain="database" path="launcher_4_by_4.db" />
     <include domain="database" path="launcher_3_by_3.db" />
     <include domain="database" path="launcher_2_by_2.db" />
+    <include domain="database" path="launcher_7_by_3.db" />
     <include domain="sharedpref" path="com.android.launcher3.prefs.xml" />
     <include domain="file" path="downgrade_schema.json" />