New System Api: getGroupIdLevel2

- add new flag

Bug: b/381171540
Test: atest
FLAG: com.android.internal.telephony.flags.get_group_id_level2
Change-Id: Ie49c055747f6e5e9f676ba0afe9f31700868b8ba
diff --git a/flags/uicc.aconfig b/flags/uicc.aconfig
index aed4bff..d97f397 100644
--- a/flags/uicc.aconfig
+++ b/flags/uicc.aconfig
@@ -107,3 +107,11 @@
         purpose: PURPOSE_BUGFIX
     }
 }
+
+# OWNER=jinjeong TARGET=25Q2
+flag {
+    name: "get_group_id_level2"
+    namespace: "telephony"
+    description: "This flag controls to get a group id level2."
+    bug:"381171540"
+}