Update Email version# for 3.1 release

Bug: 3018936
Change-Id: Id3e2fd6a73b432309a73e2a54764c83f640f18de
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 83c8c96..b630039 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -17,8 +17,8 @@
 <manifest
     xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.android.exchange"
-    android:versionCode="300000"
-    android:versionName="3.0"
+    android:versionCode="310000"
+    android:versionName="3.1"
      >
 
     <uses-permission