[공통][Common] PMD SuspiciousConstantFieldName 해결

app/src/main/java/kr/co/zumo/app/lifeplus/helper/AppVersionHelper.java

@@ -39,8 +39,8 @@ public class AppVersionHelper {
   private Disposable disposable;
   private FirebaseRemoteConfig firebaseRemoteConfig;
 
-  private String VERSION_LATEST = "newerVersion";
-  private String VERSION_FORCE = "forceVersion";
+  private static final String VERSION_LATEST = "newerVersion";
+  private static final String VERSION_FORCE = "forceVersion";
 
   /**
    * dispose