Disable grid option feature in ThemePicker

Fixes: 158790001
Test: manual
Change-Id: I5419738d9b3be996cdcea0a7b5dc2d31ceff0055
diff --git a/AndroidManifest-common.xml b/AndroidManifest-common.xml
index ff5bf0d..dd0fc21 100644
--- a/AndroidManifest-common.xml
+++ b/AndroidManifest-common.xml
@@ -156,7 +156,8 @@
         <provider
             android:name="com.android.launcher3.graphics.GridOptionsProvider"
             android:authorities="${packageName}.grid_control"
-            android:exported="true" />
+            android:exported="true"
+            android:enabled="false" />
 
         <!--
         The settings activity. To extend point settings_fragment_name to appropriate fragment class