IMS: add ImsConfig api to get volte provisioned value.

Bug: 18576107
Change-Id: I22d9f675ec607c30906b36cdab72e4d25463ecf5
diff --git a/telephony/java/com/android/ims/internal/IImsConfig.aidl b/telephony/java/com/android/ims/internal/IImsConfig.aidl
index c5ccf5f..0109a09 100644
--- a/telephony/java/com/android/ims/internal/IImsConfig.aidl
+++ b/telephony/java/com/android/ims/internal/IImsConfig.aidl
@@ -112,4 +112,12 @@
      * @return void
      */
     oneway void setFeatureValue(int feature, int network, int value, ImsConfigListener listener);
+
+    /**
+     * Gets the value for IMS volte provisioned.
+     * This should be the same as the operator provisioned value if applies.
+     *
+     * @return void
+     */
+    boolean getVolteProvisioned();
 }