Update remap_disconnect_cause_sip_request_cancelled flag to be exported.

This CL ensures that the Telephony flag remap_disconnect_cause_sip_request_cancelled is exported. It also removes an unnecessary duplicate definition that defines  simultaneous_calling_indications as exported as well.

Bug: 351258918
Flag: EXEMPT resource only update
Test: N/A flag change only
Change-Id: Ia67d40b7f007c9bf7ef2dbe4f2ba307ce45efbe7
diff --git a/flags/calling.aconfig b/flags/calling.aconfig
index 3bce279..550340f 100644
--- a/flags/calling.aconfig
+++ b/flags/calling.aconfig
@@ -4,7 +4,6 @@
 # OWNER=breadley TARGET=24Q3
 flag {
   name: "simultaneous_calling_indications"
-  is_exported: true
   namespace: "telephony"
   description: "APIs that are used to notify simultaneous calling changes to other applications."
   bug: "297446980"
@@ -50,4 +49,5 @@
     metadata {
         purpose: PURPOSE_BUGFIX
     }
+    is_exported: true
 }