3.31.0: Adds new SDK versions and contract files (#3485)

* Adding new SDK Version and Contract Files.

* Code changes to reflect the correct date of release.

* Code changes to address review comments.

* Code changes to add few fixes.

Author: kundadebdatta

Directory.Build.props

@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 	<PropertyGroup>
-		<ClientOfficialVersion>3.30.1</ClientOfficialVersion>
-		<ClientPreviewVersion>3.30.1</ClientPreviewVersion>
+		<ClientOfficialVersion>3.31.0</ClientOfficialVersion>
+		<ClientPreviewVersion>3.31.0</ClientPreviewVersion>
 		<ClientPreviewSuffixVersion>preview</ClientPreviewSuffixVersion>
 		<DirectVersion>3.29.1</DirectVersion>
 		<EncryptionOfficialVersion>2.0.0</EncryptionOfficialVersion>