Update javadocs for PermissionManager.addListener

Author: RHenigan

base/src/main/java/com/smartdevicelink/managers/permission/BasePermissionManager.java

@@ -392,7 +392,8 @@ private void notifyListener(@NonNull PermissionFilter filter){
     }
 
     /**
-     * Add a listener to be called when there is permissions change
+     * Add a listener to be called when there is permissions change.
+     * When the listener is added it will be called immediately with the current permission values if the values comply with with the passed groupType
      * @param permissionElements list of PermissionElement that represents the RPC names and their parameters
      * @param groupType PermissionGroupType int value represents whether we need the listener to be called when there is any permissions change or only when all permission become allowed
      * @param listener OnPermissionChangeListener interface