Release integration/8.4.0 to dev, Fixes AB#3669341 (#2532)

### Summary
Updating changelog and versioning.


[AB#3669341](https://identitydivision.visualstudio.com/Engineering/_workitems/edit/3669341)

---------

Co-authored-by: Azure DevOps Pipeline <build-agent@azuredevops.com>

Author: melissaahn

changelog

@@ -2,6 +2,10 @@ MSAL Wiki : https://github.com/AzureAD/microsoft-authentication-library-for-andr
 
 vNext
 ----------
+
+Version 8.4.0
+----------
+- [PATCH] Update common @24.4.0
 - [MINOR] Provide public api to set custom headers for CIAM requests (#2511)
 
 Version 8.3.3

msal/versioning/version.properties

@@ -1,3 +1,3 @@
 #Wed Aug 01 15:24:11 PDT 2018
-versionName=8.3.3
+versionName=8.4.0
 versionCode=0