Add flag for Settings Catalyst project

Test: compile
Bug: 323791114
Bug: 335132588
Flag: EXEMPT add com.android.settingslib.flags.settings_catalyst
Change-Id: I9060ee00b18770499b5aa41a9cb537adfab3bcbe
diff --git a/packages/SettingsLib/aconfig/settingslib.aconfig b/packages/SettingsLib/aconfig/settingslib.aconfig
index 403e219..83a986b1 100644
--- a/packages/SettingsLib/aconfig/settingslib.aconfig
+++ b/packages/SettingsLib/aconfig/settingslib.aconfig
@@ -112,3 +112,10 @@
       purpose: PURPOSE_BUGFIX
     }
 }
+
+flag {
+    name: "settings_catalyst"
+    namespace: "android_settings"
+    description: "Settings catalyst project migration"
+    bug: "323791114"
+}
\ No newline at end of file