Add work profile feature flag

Fix: 296290011
Test: basic voice call + data browsing
Change-Id: I8404d5c68324dc6764eb2e238227883276fc7898
diff --git a/flags/subscription.aconfig b/flags/subscription.aconfig
new file mode 100644
index 0000000..0521cb9
--- /dev/null
+++ b/flags/subscription.aconfig
@@ -0,0 +1,8 @@
+package: "com.android.internal.telephony.flags"
+
+flag {
+  name: "work_profile_api_split"
+  namespace: "telephony"
+  description: "To support separation between personal and work from TelephonyManager and SubscriptionManager API perspective."
+  bug: "296076674"
+}
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