add final to static strings that need it [1]

Summary:
^
This should help in kotlin conversions.

In this diff, I am running jast codemod on instagram

> arc jast -plugin fbsource//xplat/java/com/facebook/tools/jast/codemods/staticconstfields:staticconstfield -target fbandroid/java/com/instagram:instagram -deep

Reviewed By: jocelynluizzi13

Differential Revision: D53266142

fbshipit-source-id: 5cd40f77860278bb0aac9d9a7a21c30c6a3efad9

java/com/facebook/soloader/SoLoader.java

@@ -93,7 +93,7 @@ public class SoLoader {
   /* package */ @Nullable static SoFileLoader sSoFileLoader;
 
   // optional identifier strings to facilitate bytecode analysis
-  public static String VERSION = "0.10.5";
+  public static final String VERSION = "0.10.5";
 
   /**
    * locking controlling the list of SoSources. We want to allow long running iterations over the