Add flags for AP domain selection service

ap_domain_selection_enabled and use_aosp_domain_selection_service

Bug: 258112541
Test: build
Change-Id: I4b9bd55eb2d9eb8b20800dd374bb4a9cd13ae43c
diff --git a/flags/Android.bp b/flags/Android.bp
index 2f9ae87..a83da8b 100644
--- a/flags/Android.bp
+++ b/flags/Android.bp
@@ -23,6 +23,7 @@
     package: "com.android.internal.telephony.flags",
     srcs: [
       "data.aconfig",
+      "domainselection.aconfig",
       "ims.aconfig",
       "messaging.aconfig",
       "misc.aconfig",