Fixed restoring encrypted notes

On first restore, when no password was present into app's preferences yet, the encrypted notes were stored into database without content due to password check failure

omniNotes/src/main/java/it/feio/android/omninotes/utils/Security.kt

@@ -60,7 +60,7 @@ class Security private constructor(){
                 Base64.encodeToString(cipher.doFinal(clearText), Base64.DEFAULT)
             } catch (e: Exception) {
                 LogDelegate.e("Something is gone wrong encrypting", e)
-                ""
+                value
             }
         }