TelephonyProvider : Do not ignore seletion when quering "current"

- MMS uses "current" and apnName when quering MMSC, but TelephonyProvider ignores apnsName.
In result, MMS  would get wrong MMSC if there are two more apns for certain mcc/mnc in apns-conf.xml.

Change-Id: I58a9f8c7655b500687c77f5f96808557934b5e21
diff --git a/src/com/android/providers/telephony/TelephonyProvider.java b/src/com/android/providers/telephony/TelephonyProvider.java
index 85bd0f6..404c015 100644
--- a/src/com/android/providers/telephony/TelephonyProvider.java
+++ b/src/com/android/providers/telephony/TelephonyProvider.java
@@ -333,8 +333,8 @@
 
             case URL_CURRENT: {
                 qb.appendWhere("current IS NOT NULL");
-                // ignore the selection
-                selection = null;
+                // do not ignore the selection since MMS may use it.
+                //selection = null;
                 break;
             }