telephony: Update comments for preferred network mode

Change-Id: I4718674ff73116cc6bbec4540c3450ed14663c0d
diff --git a/core/java/android/provider/Settings.java b/core/java/android/provider/Settings.java
index 3810eb3..d4b6b07 100644
--- a/core/java/android/provider/Settings.java
+++ b/core/java/android/provider/Settings.java
@@ -5803,14 +5803,7 @@
         public static final String CALL_AUTO_RETRY = "call_auto_retry";
 
         /**
-         * The preferred network mode   7 = Global
-         *                              6 = EvDo only
-         *                              5 = CDMA w/o EvDo
-         *                              4 = CDMA / EvDo auto
-         *                              3 = GSM / WCDMA auto
-         *                              2 = WCDMA only
-         *                              1 = GSM only
-         *                              0 = GSM / WCDMA preferred
+         * See RIL_PreferredNetworkType in ril.h
          * @hide
          */
         public static final String PREFERRED_NETWORK_MODE =