Renamed VOLTE_VT config constant to disassociate from VoLTE/VT.

Change-Id: Ie5228813387641f359fdccb47450c7567b91b0f5
diff --git a/Common/src/com/googlecode/android_scripting/facade/tele/ImsManagerFacade.java b/Common/src/com/googlecode/android_scripting/facade/tele/ImsManagerFacade.java
index 05d982e..44496be 100755
--- a/Common/src/com/googlecode/android_scripting/facade/tele/ImsManagerFacade.java
+++ b/Common/src/com/googlecode/android_scripting/facade/tele/ImsManagerFacade.java
@@ -61,7 +61,7 @@
             throws ImsException{
         android.provider.Settings.Global.putInt(
                   mContext.getContentResolver(),
-                  android.provider.Settings.Global.VOLTE_VT_ENABLED, enable ? 1 : 0);
+                  android.provider.Settings.Global.ENHANCED_4G_MODE_ENABLED, enable ? 1 : 0);
 
         if (mImsManager != null) {
             Log.v("mImsManager is not null in setting ehanced 4G mode.");