tweaks to codecs in default conifg

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@13485 d0543943-73ff-0310-b7d9-9358b9ac24b2

conf/vars.xml

@@ -84,7 +84,7 @@
        H264             - H.264 Video
 
   -->
-  <X-PRE-PROCESS cmd="set" data="global_codec_prefs=G722,PCMU,PCMA,GSM"/>
+  <X-PRE-PROCESS cmd="set" data="global_codec_prefs=G7221@32000h,G7221@16000h,G722,PCMU,PCMA,GSM"/>
   <X-PRE-PROCESS cmd="set" data="outbound_codec_prefs=PCMU,PCMA,GSM"/>
 
   <!--