Add carrier config for allowing merge of RTT calls

Add a carrier config key that specifies whether merging an RTT call is
allowed.

Bug: 136035168
Test: manual

Change-Id: I8cfdf68c69b50abed88d7c835db0480a53755f5a
Merged-In: I8cfdf68c69b50abed88d7c835db0480a53755f5a

1 files changed, 9 insertions, 0 deletions

diff --git a/telephony/java/android/telephony/CarrierConfigManager.java b/telephony/java/android/telephony/CarrierConfigManager.java
index 77e35e1530bf..57d84a97748c 100755
--- a/telephony/java/android/telephony/CarrierConfigManager.java
+++ b/telephony/java/android/telephony/CarrierConfigManager.java
@@ -468,6 +468,14 @@ public class CarrierConfigManager {
             "notify_handover_video_from_wifi_to_lte_bool";
 
     /**
+     * Flag specifying whether the carrier supports merging a RTT call with a voice call,
+     * downgrading the call in the process.
+     * @hide
+     */
+    public static final String KEY_ALLOW_MERGING_RTT_CALLS_BOOL =
+             "allow_merging_rtt_calls_bool";
+
+    /**
      * Flag specifying whether the carrier wants to notify the user when a VT call has been handed
      * over from LTE to WIFI.
      * <p>
@@ -2776,6 +2784,7 @@ public class CarrierConfigManager {
         sDefaults.putBoolean(KEY_CARRIER_VOLTE_AVAILABLE_BOOL, false);
         sDefaults.putBoolean(KEY_CARRIER_VT_AVAILABLE_BOOL, false);
         sDefaults.putBoolean(KEY_NOTIFY_HANDOVER_VIDEO_FROM_WIFI_TO_LTE_BOOL, false);
+        sDefaults.putBoolean(KEY_ALLOW_MERGING_RTT_CALLS_BOOL, false);
         sDefaults.putBoolean(KEY_NOTIFY_HANDOVER_VIDEO_FROM_LTE_TO_WIFI_BOOL, false);
         sDefaults.putBoolean(KEY_SUPPORT_DOWNGRADE_VT_TO_AUDIO_BOOL, true);
         sDefaults.putString(KEY_DEFAULT_VM_NUMBER_STRING, "");