Add some helper methods to set and get the build fingerprint

Author: Fuzion24

app/src/main/java/fuzion24/device/vulnerability/util/SharedPreferencesUtils.java

@@ -13,6 +13,8 @@ public class SharedPreferencesUtils {
     private static final String PREFS_LAST_LIST_OF_SCANS = "PREFS_LIST_OF_SCANS";
     private static final String PREFS_FIRST_RUN = "PREFS_FIRST_RUN";
     private static final String PREFS_AUTOMATIC_SHARING_ENABLE = "PREFS_AUTOMATIC_SHARING_ENABLE";
+    private static final String BUILD_FINGERPRINT_HASH   = "BUILD_FINGERPRINT_HASH";
+
 
     private static final String PREFS_NAME = "com.nowsecure.android.vts.PREFERENCE_FILE_KEY";
 
@@ -57,4 +59,16 @@ public static void setTheListOfScansAvailable(Context context, List<String> list
         editor.apply();
     }
 
+    public static void setBuildUpdateFingerPrint(Context context, String fingerprint){
+        SharedPreferences.Editor editor = getPreferences(context).edit();
+
+        editor.putString(BUILD_FINGERPRINT_HASH, fingerprint);
+
+        editor.apply();
+    }
+
+    public static String getBuildUpdateFingerprint(Context context){
+        return getPreferences(context).getString(BUILD_FINGERPRINT_HASH, null);
+    }
+
 }