add null checking interview finished

Author: derohimat

qasdk/src/main/java/co/astrnt/qasdk/AstrntSDK.java

@@ -577,7 +577,11 @@ public boolean isAllUploaded() {
     public boolean isFinished() {
         InterviewApiDao interviewApiDao = getCurrentInterview();
         InformationApiDao informationApiDao = getInformation();
-        return interviewApiDao.isFinished() || informationApiDao.isFinished();
+        if (interviewApiDao == null || informationApiDao == null) {
+            return true;
+        } else {
+            return interviewApiDao.isFinished() || informationApiDao.isFinished();
+        }
     }
 
     public boolean isCanContinue() {