IMS: RTT interface changes

Changes to implement RTT feature

Test: compilation
Change-Id: I6ce6993f5ecc321b91642cab297efb35cda3de2b

telephony/java/com/android/ims/ImsConfig.java

@@ -475,9 +475,15 @@ public class ImsConfig {
          */
         public static final int VICE_SETTING_ENABLED = 65;
 
+        /**
+         * RTT status: Enabled (1), or Disabled (0).
+         * Value is in Integer format.
+         */
+        public static final int RTT_SETTING_ENABLED = 66;
+
         // Expand the operator config items as needed here, need to change
         // PROVISIONED_CONFIG_END after that.
-        public static final int PROVISIONED_CONFIG_END = VICE_SETTING_ENABLED;
+        public static final int PROVISIONED_CONFIG_END = RTT_SETTING_ENABLED;
 
         // Expand the operator config items as needed here.
     }