Introduce a flag for using the carrier service changed callbacks.

Test: CarrierPrivilegeAuthenticatorTest
Change-Id: Ia28c6abca67866c1de953cb61953a0d2882cd7e2
diff --git a/service/src/com/android/server/ConnectivityService.java b/service/src/com/android/server/ConnectivityService.java
index f888da5..b3f0b2c 100755
--- a/service/src/com/android/server/ConnectivityService.java
+++ b/service/src/com/android/server/ConnectivityService.java
@@ -1427,7 +1427,7 @@
         public CarrierPrivilegeAuthenticator makeCarrierPrivilegeAuthenticator(
                 @NonNull final Context context, @NonNull final TelephonyManager tm) {
             if (isAtLeastT()) {
-                return new CarrierPrivilegeAuthenticator(context, tm);
+                return new CarrierPrivilegeAuthenticator(context, this, tm);
             } else {
                 return null;
             }