Custom pin length (cypherstack#555)

* WIP: pinCount stuff

* pin decoration + and pinCount is 0

* pin length tweaks

* fixes error when backspacing pin + add icon to flushbar

* removed Constants.pinLength + changes to "change pin" setting

* testing pin output

* WIP: tests pass + commented out isRandom pin 1234

* removed pin output

---------

Co-authored-by: ryleedavis <rylee@cypherstack.com>
Co-authored-by: julian <julian@cypherstack.com>

Author: 3 people

lib/pages/pinpad_views/create_pin_view.dart

@@ -3,18 +3,19 @@ import 'dart:io';
 
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
-import 'package:stackduo/notifications/show_flush_bar.dart';
-import 'package:stackduo/pages/home_view/home_view.dart';
-import 'package:stackduo/providers/global/prefs_provider.dart';
-import 'package:stackduo/providers/global/secure_store_provider.dart';
-import 'package:stackduo/themes/stack_colors.dart';
-import 'package:stackduo/utilities/assets.dart';
-import 'package:stackduo/utilities/biometrics.dart';
-import 'package:stackduo/utilities/flutter_secure_storage_interface.dart';
-import 'package:stackduo/utilities/text_styles.dart';
-import 'package:stackduo/widgets/background.dart';
-import 'package:stackduo/widgets/custom_buttons/app_bar_icon_button.dart';
-import 'package:stackduo/widgets/custom_pin_put/custom_pin_put.dart';
+import 'package:stackwallet/notifications/show_flush_bar.dart';
+import 'package:stackwallet/pages/home_view/home_view.dart';
+import 'package:stackwallet/providers/global/prefs_provider.dart';
+import 'package:stackwallet/providers/global/secure_store_provider.dart';
+import 'package:stackwallet/themes/stack_colors.dart';
+import 'package:stackwallet/utilities/assets.dart';
+import 'package:stackwallet/utilities/biometrics.dart';
+import 'package:stackwallet/utilities/constants.dart';
+import 'package:stackwallet/utilities/flutter_secure_storage_interface.dart';
+import 'package:stackwallet/utilities/text_styles.dart';
+import 'package:stackwallet/widgets/background.dart';
+import 'package:stackwallet/widgets/custom_buttons/app_bar_icon_button.dart';
+import 'package:stackwallet/widgets/custom_pin_put/custom_pin_put.dart';
 
 class CreatePinView extends ConsumerStatefulWidget {
   const CreatePinView({