Revert "Clean up 24Q3 aconfig flag reset_mobile_network_settings"

This reverts commit 19f9b23533e83d2dce00ca3a1cc280c2830c5bc2.

Reason for revert: Exported FR flag should never clean up from .aconfig

Change-Id: I1c9c898f911a336090098c935e375b67b0552b9f
diff --git a/flags/misc.aconfig b/flags/misc.aconfig
index 2d6992a..303c0ff 100644
--- a/flags/misc.aconfig
+++ b/flags/misc.aconfig
@@ -78,6 +78,15 @@
   bug: "309896524"
 }
 
+# OWNER=rambowang TARGET=24Q3
+flag {
+    name: "reset_mobile_network_settings"
+    is_exported: true
+    namespace: "telephony"
+    description: "Allows applications to launch Reset Mobile Network Settings page in Settings app."
+    bug:"271921464"
+}
+
 # OWNER=sangyun TARGET=24Q3
 flag {
     name: "roaming_notification_for_single_data_network"