DO NOT MERGE Use Wi-Fi calling by default

On master-nova builds, we should always be using Wi-Fi calling.

Change-Id: I9efc1d267110464f8e7a5f615466aa71aa35cc6d
diff --git a/src/com/android/phone/PhoneInterfaceManager.java b/src/com/android/phone/PhoneInterfaceManager.java
index 8ce45aa..02dea1c 100644
--- a/src/com/android/phone/PhoneInterfaceManager.java
+++ b/src/com/android/phone/PhoneInterfaceManager.java
@@ -1092,7 +1092,7 @@
 
     private static int getWhenToMakeWifiCallsDefaultPreference() {
         // TODO(sail): Use a build property to choose this value.
-        return TelephonyManager.WifiCallingChoices.NEVER_USE;
+        return TelephonyManager.WifiCallingChoices.ALWAYS_USE;
     }
 
     @Override