Enforce system radius instead of separate value for widgets in launcher

The change is behind a flag. This is to get to the stage of having
consistent corner radius across rectangular widgets.

Bug: 373351337
Test: Unit test and manual
Flag: com.android.launcher3.enforce_system_radius_for_app_widgets
Change-Id: I23d8d3bb2561b4fc3f780fc4ddce62e8b9293192
diff --git a/aconfig/launcher.aconfig b/aconfig/launcher.aconfig
index fca1647..c71b833 100644
--- a/aconfig/launcher.aconfig
+++ b/aconfig/launcher.aconfig
@@ -485,3 +485,10 @@
     description: "Enables launcher recents opening inside of a window instead of being hosted in launcher activity."
     bug: "292269949"
 }
+
+flag {
+   name: "enforce_system_radius_for_app_widgets"
+   namespace: "launcher"
+   description: "Enforce system radius for widget corners instead of a separate 16.dp value"
+   bug: "370950552"
+}