add columns of Carrier about MVNO

To recognize MVNO, use new fields, MVNO_MATCH_DATA and MVNO_TYPE
(SPN, IMSI, GID(Group Identifier Level 1)).

Bug: 8143480
Change-Id: Idfa06c6f39a2c15ff4f0815724823f44b76ac819
diff --git a/src/java/android/provider/Telephony.java b/src/java/android/provider/Telephony.java
index 50f3203..cf98170 100644
--- a/src/java/android/provider/Telephony.java
+++ b/src/java/android/provider/Telephony.java
@@ -1820,6 +1820,21 @@
           * but currently only used for LTE(14) and EHRPD(13).
           */
         public static final String BEARER = "bearer";
+
+        /**
+          * MVNO type
+          * spn(Service Provider Name), imsi, gid(Group Identifier Level 1)
+          */
+        public static final String MVNO_TYPE = "mvno_type";
+
+        /**
+          * MVNO data
+          * Use the following examples.
+          * spn: A MOBILE, BEN NL, ...
+          * imsi: 302720x94, 2060188, ...
+          * gid: 4E, 33, ...
+          */
+        public static final String MVNO_MATCH_DATA = "mvno_match_data";
     }
 
     /**