Flagging requirement for notifyDataActivityChanged
based on Slot.

Flagging requirement ref topic:
https://googleplex-android-review.git.corp.google.com/q/topic:%22clear_dataactivity_onsimremoval%22

Bug: 309896936
Test: atest FrameworksTelephonyTests & CtsTelephonyTestCases
Change-Id: I3cffdeb6ebca61a827cefa256161ccbc163614a3
diff --git a/flags/data.aconfig b/flags/data.aconfig
index befb38d..52cd486 100644
--- a/flags/data.aconfig
+++ b/flags/data.aconfig
@@ -49,3 +49,10 @@
   bug:"286171724"
 }
 
+flag {
+ name: "notify_data_activity_changed_with_slot"
+  namespace: "telephony"
+  description: "notify data activity changed for slot id"
+  bug: "309896936"
+}
+