VpnSettings: rename some variables.

Change-Id: I0550bebc55a42ad11768729d098ff5258442747e
diff --git a/src/com/android/settings/vpn2/VpnSettings.java b/src/com/android/settings/vpn2/VpnSettings.java
index d3e8ac0..0153f9b 100644
--- a/src/com/android/settings/vpn2/VpnSettings.java
+++ b/src/com/android/settings/vpn2/VpnSettings.java
@@ -346,7 +346,7 @@
         }
 
         VpnConfig config = new VpnConfig();
-        config.sessionName = profile.name;
+        config.session = profile.name;
         config.routes = profile.routes;
         if (!profile.searchDomains.isEmpty()) {
             config.searchDomains = Arrays.asList(profile.searchDomains.split(" "));