Reinstate widget picker size filter behind a flag.

Bug: 345482907
Test: manually
Flag: com.android.systemui.enable_widget_picker_size_filter
Change-Id: Ic181f441bfc13d9b837684055054f295c785422f
diff --git a/packages/SystemUI/aconfig/communal.aconfig b/packages/SystemUI/aconfig/communal.aconfig
index 2e9af7e..afcd8a9 100644
--- a/packages/SystemUI/aconfig/communal.aconfig
+++ b/packages/SystemUI/aconfig/communal.aconfig
@@ -7,3 +7,13 @@
     description: "Enables the communal hub experience"
     bug: "304584416"
 }
+
+flag {
+    name: "enable_widget_picker_size_filter"
+    namespace: "communal"
+    description: "Enables passing a size filter to the widget picker"
+    bug: "345482907"
+   metadata {
+        purpose: PURPOSE_BUGFIX
+   }
+}